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Articles 1381 - 1410 of 1524
Full-Text Articles in Physical Sciences and Mathematics
Magnetic Phase Transition In Mnfep0.5as0.4si 0.1, Jianli Wang, Stewart J. Campbell, O Tegus, E Bruck, S X. Dou
Magnetic Phase Transition In Mnfep0.5as0.4si 0.1, Jianli Wang, Stewart J. Campbell, O Tegus, E Bruck, S X. Dou
Australian Institute for Innovative Materials - Papers
We have carried out a detailed investigation of the magnetic phase transition in MnFeP0.5As0.4Si0.1. Temperature hysteresis has been observed in the variable temperature magnetization curves (Bappl = 0.01 T) with TC W ~ 302 K on warming and TC C ~ 292 K on cooling. The first order nature of this transition in MnFeP0.5As0.4Si0.1 is confirmed by the negative slope obtained from isotherms of M2 versus B/M around the critical temperature. Linear thermal expansion measurements reveal a large volume change, ΔV/V∼8.7×10-3, at the …
The Control Of Time-Dependent Buckling Patterns In Thin Confined Elastomer Film, Brad Winton, Mihail Ionescu, S X. Dou
The Control Of Time-Dependent Buckling Patterns In Thin Confined Elastomer Film, Brad Winton, Mihail Ionescu, S X. Dou
Australian Institute for Innovative Materials - Papers
Low energy metal ion implantation has been used to combine an easy “bottom-up” way of creating and tuning different topographic structures on submicron to micrometer scales with the embedding of a metallic element-rich functionalized layer at the surface for a variety of scientific and technological applications. The self-organizing and complex patterns of functionalized topographic structures are highly dependent on the implanted metal ion species, variations in the geometric confinement of the buckled areas on the larger unmodified elastomer film, and the boundary conditions of the buckled regions. Systematic investigations of these dependencies have been carried out via optical and atomic …
A Sign Of Field-Induced First Order Magnetic State Transition And Giant Reversible Magnetocaloric Effect In Cobalt Hydroxide Nanosheets, Precious Shamba, Rong Zeng, J Q Wang, S X. Dou
A Sign Of Field-Induced First Order Magnetic State Transition And Giant Reversible Magnetocaloric Effect In Cobalt Hydroxide Nanosheets, Precious Shamba, Rong Zeng, J Q Wang, S X. Dou
Australian Institute for Innovative Materials - Papers
We report the synthesis of β−Co(OH)2 nanosheets using microwave assisted hydrothermal and conventional chemical reaction methods. A magnetic transition at an onset temperature, T1 ~ 96 K, and a sign of antiferromagnetic state transition at the Néel temperature, TN=9~10 K, can be determined from M-T curves and M-H curves magnetic properties investigation. It is found that a sign of field-induced first order transition below 9 K, act as a role of reversing the magnetocaloric effect from negative to positive value. The large reversible magnetic-entropy change (∆SM) of 17 J/kg K around 11 K for …
Target Dna Recognition Using Electrochemical Impedance Spectroscopy, Pauline Michaels, Simone Ciampi, Chan Yean Yean, J Justin Gooding
Target Dna Recognition Using Electrochemical Impedance Spectroscopy, Pauline Michaels, Simone Ciampi, Chan Yean Yean, J Justin Gooding
Australian Institute for Innovative Materials - Papers
Electrochemical impedance spectroscopy was used to differentiate between different target DNA sequences without the use of a redox label or application of large bias voltages. This method relies on the formation of a mixed self-assembled monolayer (SAMs) composed of single-stranded DNA and a diluent, mercaptoethanol. Recognition of the DNA analytes was achieved through the significant increase in conductance for the double stranded DNA, as compared to single-stranded DNA. Non-complementary and single base-pair mismatches were also able to be differentiated. 2010 IEEE.
Silicon (100) Surfaces Modified By Osmium Bipyridine Complexes, Simone Ciampi, Leo M. H Lai, J Justin Gooding
Silicon (100) Surfaces Modified By Osmium Bipyridine Complexes, Simone Ciampi, Leo M. H Lai, J Justin Gooding
Australian Institute for Innovative Materials - Papers
Tethered osmium bypiridine-pyridine complexes [Os(bpy)2Clpy-R] were prepared from chemically modified non-oxidized silicon (100) electrodes. Pyridinyl groups at the distal end of self-assembled monolayers (SAMs)-modified silicon surfaces were used to coordinatively bind a representative osmium bipyridil complex precursor [Os(bpy)2Cl2]. SAMs presenting the putative osmium ligand were prepared by a step-wise procedure using click reactions of acetylene-terminated alkyl monolayers and isonicotinic acid azide derivatives. The redox properties of the modified Si(100) electrodes were characterized using cyclic voltammetry. 2010 IEEE.
Preparation Of Thiol-Terminated Monolayers On Silicon(100) Surfaces Using Thioacetyl-Protected Alkynethiol, Cheuk Chi Albert Ng, Guillaume Le Saux, Muthukumar Chockalingam, Simone Ciampi, Jason Brian Harper, J Justin Gooding
Preparation Of Thiol-Terminated Monolayers On Silicon(100) Surfaces Using Thioacetyl-Protected Alkynethiol, Cheuk Chi Albert Ng, Guillaume Le Saux, Muthukumar Chockalingam, Simone Ciampi, Jason Brian Harper, J Justin Gooding
Australian Institute for Innovative Materials - Papers
The attachment of acetyl-protected alkynethiol groups onto silicon(100) surfaces was achieved using a hydrosilylation methodology. Subsequent deprotection of the thiols using either hydrochloric acid or ammonia solution was investigated using X-ray photoelectron spectroscopy (XPS), and compared with similar reaction in solution. It was found that ammonia solution was more efficient than hydrochloric acid for the deprotection step. However, the deprotection was much less efficient on the surface than in solution. 2010 IEEE.
Redetermination Of Di-U-Hydrido-Hexahydridotetrakis(Tetrahydrofuran)~ Dialuminium(Iii)Magnesium(Ii), Hima Kumar Lingam, Xuenian Chen, Teshome B. Yisgedu, Zhenguo Huang, Ji-Cheng Zhao, Sheldon G. Shore
Redetermination Of Di-U-Hydrido-Hexahydridotetrakis(Tetrahydrofuran)~ Dialuminium(Iii)Magnesium(Ii), Hima Kumar Lingam, Xuenian Chen, Teshome B. Yisgedu, Zhenguo Huang, Ji-Cheng Zhao, Sheldon G. Shore
Australian Institute for Innovative Materials - Papers
No abstract provided.
Fluctuation Conductivity Of Single-Crystalline Bafe1.8 Co0.2as2 In The Critical Region, Soo Hyun Kim, Changho Choi, Myung-Hwa Jung, Jung-Bum Yoon, Young-Hun Jo, Xiaolin Wang, X.H Chen, X.F Wang, Sung-Ik Lee, Ki-Young Choi
Fluctuation Conductivity Of Single-Crystalline Bafe1.8 Co0.2as2 In The Critical Region, Soo Hyun Kim, Changho Choi, Myung-Hwa Jung, Jung-Bum Yoon, Young-Hun Jo, Xiaolin Wang, X.H Chen, X.F Wang, Sung-Ik Lee, Ki-Young Choi
Australian Institute for Innovative Materials - Papers
The magnetofluctuation conductivity, called excess conductivity, originated from the forming of the superconducting droplet near to the mean-field transition temperature, was measured for the optimally doped BaFe1.8Co0.2As2 single crystals with a critical temperature, Tc, of 24.6 K. This measurement of the excess conductivity for magnetic fields up to 9 T was compared with the thermodynamic scaling theory in the critical region, in which not only the Gaussian fluctuation but also fourth order terms of the order parameter are included. An analysis of the excess conductivity showed that the superconductivity followed three-dimensional scaling rather …
Magnetic Flux Penetration In Polycrystalline Smfeo0.75f0.2as, Zhi W. Lin, Yong Jian Li, Jian G. Zhu, Youguang Guo, Xiaolin Wang
Magnetic Flux Penetration In Polycrystalline Smfeo0.75f0.2as, Zhi W. Lin, Yong Jian Li, Jian G. Zhu, Youguang Guo, Xiaolin Wang
Australian Institute for Innovative Materials - Papers
The recently discovered Fe–As superconducting materials which show high potential ability to carry current due to their low anisotropy have attracted a great number of attentions to understand their superconductivity mechanism and explore their applications. This paper presents a method to synthesis SmFeO0.75F0.20As polycrystalline by hot press in detail. The magnetization at different temperatures and applied fields obtained by a superconducting quantum interference device are also discussed. In addition, the local magnetization process is presented by magneto-optical imaging technique at the conditions of zero-field-cooling and field-cooling. It is found that the collective magnetization process …
The Mechanical And The Electrical Properties Of Conducting Polypyrrole Fibers, Javad Foroughi, Shaban R. Ghorbani, Germanas Peleckis, Geoffrey M. Spinks, Gordon G. Wallace, Xiaolin Wang, S X. Dou
The Mechanical And The Electrical Properties Of Conducting Polypyrrole Fibers, Javad Foroughi, Shaban R. Ghorbani, Germanas Peleckis, Geoffrey M. Spinks, Gordon G. Wallace, Xiaolin Wang, S X. Dou
Australian Institute for Innovative Materials - Papers
The mechanical and the electrical properties of polypyrrole (PPy) fibers and electrochemically deposited PPy films were studied. It was found that the PPy fibers showed a significantly higher strength than the PPy films due to better orientation of the molecular structure. The electrochemically prepared PPy films had a higher electrical conductivity than that of the fibers at high temperature. At low temperature, the PPy fibers showed the higher conductivity. The conductivity results were analyzed in the frame of the three-dimensional variable range hopping model. The results showed that at room temperature the average hopping distance for the fibers was about …
Structure, Magnetic, And Thermal Properties Of Nd1-Xlaxcro3 (0 ≤ X ≤ 1.0), Yi Du, Zhenxiang Cheng, Xiaolin Wang, S X. Dou
Structure, Magnetic, And Thermal Properties Of Nd1-Xlaxcro3 (0 ≤ X ≤ 1.0), Yi Du, Zhenxiang Cheng, Xiaolin Wang, S X. Dou
Australian Institute for Innovative Materials - Papers
Perovskite-type Nd1−xLaxCrO3(0 ≤ x ≤1.0) polycrystalline samples were synthesized using solid state reaction. Structural studies indicate that the lattice parameters, metal–oxygen bond lengths, and angles of Nd1−xLaxCrO3 strongly depend on the La content. Two magnetic transition temperatures, Cr3+ antiferromagnetic ordering temperature (TN) and the spin reorientation phase transition temperature (TSRPT), have been observed in the M-T curves. The increase in TN and decrease in TSRPT with increasing x value can be explained by the change in the magnetic interactions due to La …
Synthesis And Electrochemical Studies On Li2cusno4 And Li2cusnsio6 As Negative Electrode In Lithium Batteries, Atef Y. Shenouda, Hua-Kun Liu
Synthesis And Electrochemical Studies On Li2cusno4 And Li2cusnsio6 As Negative Electrode In Lithium Batteries, Atef Y. Shenouda, Hua-Kun Liu
Australian Institute for Innovative Materials - Papers
Li2CuSnO4 and Li2CuSnSiO6 were prepared from their precursors compounds using Brij surfactant and a hydrothermal autoclave method. X-ray diffraction characterization revealed that the crystal structures of these compounds were tetragonal. Scanning electron microscope investigation showed the particle size morphology of Li2CuSnSiO6 is larger than that of Li2CuSnO4. Electrochemical impedance spectroscopy (EIS) explained that Li2CuSnO4 cell had higher charge transfer resistance (Rct = 2936Ω) than that of Li2CuSnSiO6 (38Ω). Furthermore, the reversible specific discharge capacity of the Li2CuSnSiO6 …
Magnetotransport Of La0.70ca0.3-Xsrxmno3(Ag): A Potential Room Temperature Bolometer And Magnetic Sensor, V P. Awana, Rahul Tripathi, Neeraj Kumar, H Kishan, G V. Bhalla, Rong Zeng, L.S Sharth Chandra, V Ganesan, H U. Habermeier
Magnetotransport Of La0.70ca0.3-Xsrxmno3(Ag): A Potential Room Temperature Bolometer And Magnetic Sensor, V P. Awana, Rahul Tripathi, Neeraj Kumar, H Kishan, G V. Bhalla, Rong Zeng, L.S Sharth Chandra, V Ganesan, H U. Habermeier
Australian Institute for Innovative Materials - Papers
Here we report the optimized magnetotransport properties of polycrystalline La0.70Ca0.3−xSrxMnO3 and their composites with Ag. The optimization was carried out by varying the Sr and Ag contents simultaneously to achieve large temperature coefficient of resistance (TCR) as well as low field magnetoresistance (MR) at room temperature. Sharpest paramagnetic (PM)-ferromagnetic (FM) and insulator-metal (IM) transition is observed in the vicinity of the room temperature (TC≈300 K ≈TIM) for the composition La0.70Ca0.20Sr0.10MnO3:Ag0.20. Partial substitution of larger Sr2+ ions at the …
Synthesis And Physical Properties Of Fese1/2 Te1/2 Superconductor, V P. Awana, Anand Pal, Arpita Vajpayee, Monika Mudgel, H Kishan, Mushahid Husain, Rong Zeng, S Yu, Y F. Guo, Y.G Shi, K Yamaura, E Takayama-Muromachi
Synthesis And Physical Properties Of Fese1/2 Te1/2 Superconductor, V P. Awana, Anand Pal, Arpita Vajpayee, Monika Mudgel, H Kishan, Mushahid Husain, Rong Zeng, S Yu, Y F. Guo, Y.G Shi, K Yamaura, E Takayama-Muromachi
Australian Institute for Innovative Materials - Papers
One of the most important properties of very recently reported FeSe based superconductors is the robustness of their superconductivity under applied magnetic field. The synthesis and control of superconductivity in FeSe based compounds is rather a difficult task. Synthesis and physical property characterization for optimized superconductivity of FeSe1/2Te1/2 at 13 K is reported here. The compound crystallized in a tetragonal structure with lattice parameters a=3.8015(2) and c =6.0280(4) Å. Magnetization measurements indicated bulk superconductivity with lower critical field (Hc1) of around 180 Oe. By applying Ginzburg–Landau theory, the Hc2(0) value is estimated to …
Lanthanum Doped Multiferroic Dyfeo3: Structural And Magnetic Properties, Yi Du, Zhenxiang Cheng, Xiaolin Wang, S X. Dou
Lanthanum Doped Multiferroic Dyfeo3: Structural And Magnetic Properties, Yi Du, Zhenxiang Cheng, Xiaolin Wang, S X. Dou
Australian Institute for Innovative Materials - Papers
Lanthanum doped multiferroic DyFeO3 was synthesized by solid state reaction. X-ray diffraction and refinement show that the lattice parameters of Dy1−xLaxFeO3 increase linearly with the La content. Raman spectroscopy reveals that the short-range force constant in Dy1−xLaxFeO3 is decreased by La3+ ion substitution. The spin reorientation phase transition temperature (TSRPT) is observed to decrease along with the doping level. The antiferromagnetic ordering temperature TN of Fe3+ ions is depressed with increasing doping level. Both decreasing TSRPT and decreasing TN indicate that Fe–Dy and Fe–Fe …
Phase Formation And Magnetotransport Of Alkali Metal Doped Na0.75coo2 Thermoelectric Oxide, Priyanka Jood, Germanas Peleckis, Xiaolin Wang, S X. Dou, H Yamauchi, M Karppinen
Phase Formation And Magnetotransport Of Alkali Metal Doped Na0.75coo2 Thermoelectric Oxide, Priyanka Jood, Germanas Peleckis, Xiaolin Wang, S X. Dou, H Yamauchi, M Karppinen
Australian Institute for Innovative Materials - Papers
Synthesis and characterization of bulk NaxCoO2 samples substituted by K and Rb is reported. Phase formation studies revealed a narrow stable region for Na-alkali metal-Co system. Whisker and platelike single crystalline structures have been found to form on the surface of the pellets in case of K doping. All samples were metallic and no characteristic anomaly in R-T curves was observed for Rb doped sample. Magnetoresistance measured has a pronounced positive response only for K-doped and pure NaxCoO2 phases, reaching 11% and 7% at 5 K temperature, respectively.
Very Strong Intrinsic Flux Pinning And Vortex Avalanches In (Ba, K)Fe2as2 Superconducting Single Crystals, Xiaolin Wang, Shaban R. Ghorbani, Sung-Ik Lee, S X. Dou, C T Lin, T H. Johansen, K.H Muller, Zhenxiang Cheng, Germanas Peleckis, M Shabazi, A.J Qviller, V Yurchenko, G.L Sun, D.L Sun
Very Strong Intrinsic Flux Pinning And Vortex Avalanches In (Ba, K)Fe2as2 Superconducting Single Crystals, Xiaolin Wang, Shaban R. Ghorbani, Sung-Ik Lee, S X. Dou, C T Lin, T H. Johansen, K.H Muller, Zhenxiang Cheng, Germanas Peleckis, M Shabazi, A.J Qviller, V Yurchenko, G.L Sun, D.L Sun
Australian Institute for Innovative Materials - Papers
We report that the (Ba,K)Fe2As2 crystal with Tc=32 K shows a pinning potential, U0, as high as 104 K, with U0 showing very little field dependence. The (Ba,K)Fe2As2 single crystals become isotropic at low temperatures and high magnetic fields, resulting in a very rigid vortex lattice, even in fields very close to Hc2. The isotropic rigid vortices observed in the two-dimensional (2D) (Ba,K)Fe2As2 distinguish this compound from 2D high-Tc cuprate superconductors with 2D vortices. The vortex avalanches were also observed at low …
Giant Magnetic Entropy Change In Colossal Magnetoresistance In La0.7ca0.3mno3 Material In Low Field, Jyotish Debnath, Rong Zeng, Jung Ho Kim, S X. Dou
Giant Magnetic Entropy Change In Colossal Magnetoresistance In La0.7ca0.3mno3 Material In Low Field, Jyotish Debnath, Rong Zeng, Jung Ho Kim, S X. Dou
Australian Institute for Innovative Materials - Papers
The structural, magnetic, and magnetocaloric properties of the manganite La0.7Ca0.3MnO3 have been studied. Change in the giant magnetic entropy was observed without any noticeable magnetic hysteresis but with small thermal hysteresis losses. We observed a first order magnetic phase transition around 251 K. The magnetic entropy change observed in this work is estimated to be 5.27 J/kg K for field changes from 0 to 1.5 T based on magnetization measurements. This value is about twice as large as those for other perovskite manganites and is even larger than for Gd-based magnetic materials at low fields. …
Preparation, Characterization, And Electrochemical Performance Of Li2cusno4 And Li2cusnsio6 Electrodes For Lithium Batteries, Atef Y. Shenouda, Hua-Kun Liu
Preparation, Characterization, And Electrochemical Performance Of Li2cusno4 And Li2cusnsio6 Electrodes For Lithium Batteries, Atef Y. Shenouda, Hua-Kun Liu
Australian Institute for Innovative Materials - Papers
Lithium copper tin silicon oxide was prepared from their precursor compounds using Brij surfactant and different sources of Si such as SiO2, SiC, and Si3N4. A hydrothermal autoclave method was used in the first stage of the preparation. X-ray diffraction characterization revealed that the crystal structures of these compounds were tetragonal. Scanning electron microscope investigation showed that the particle size morphology of Li2CuSnSiO6 is larger than that of Li2CuSnO4. Electrochemical impedance spectroscopy explained that the cell prepared from the Li2CuSnSiO6 electrode using Si3 …
A Novel Multiferroic System: Rare Earth Chromates, Zhenxiang Cheng, Xiaolin Wang, S X. Dou, Hideo Kimura, Kiyoshi Ozawa
A Novel Multiferroic System: Rare Earth Chromates, Zhenxiang Cheng, Xiaolin Wang, S X. Dou, Hideo Kimura, Kiyoshi Ozawa
Australian Institute for Innovative Materials - Papers
In this work, we report on our studies on the multiferroic properties of two rare earth chromates, GdCrO3 and YCrO3. Polycrystalline bulks and thin films have been fabricated using conventional solid state reaction and pulsed laser deposition. Magnetic measurements have revealed that both compounds show weak ferromagnetism below the antiferromagnetic Neel temperature, TN, of 170 and 140 K for GdCrO3 and YCrO3, respectively. However the well-developed ferroelectric polarization electrical field loop was not successfully measured for both samples due to their low resistance. The high conductivity of the samples at room temperature is related …
Superconducting Properties Of Carbonaceous Chemical Doped Mgb2, Wenxian Li, S X. Dou
Superconducting Properties Of Carbonaceous Chemical Doped Mgb2, Wenxian Li, S X. Dou
Australian Institute for Innovative Materials - Papers
The discovery of superconductivity in magnesium diboride (MgB2: 39 K, in January 2001) (Nagamatsu et al., 2001) has generated enormous interest and excitement in the superconductivity community and the world in general, but especially among researchers into superconductivity in non-oxide and boron related compounds.
Printing Nanomaterials Using Non-Contact Printing, Charles Mire, Marc In Het Panhuis, Paul D. Calvert, Gordon G. Wallace
Printing Nanomaterials Using Non-Contact Printing, Charles Mire, Marc In Het Panhuis, Paul D. Calvert, Gordon G. Wallace
Australian Institute for Innovative Materials - Papers
We report on the use of inkjet, extrusion, and capillary printing of poly(3,4 ethylenedioxythiophene)/ poly(sodium 4-styrene-sulfonate) (PEDOT/PSS) to create structures that could be used in a flexible, implantable bionic device. Resistance values as low as 250 kΩ are demonstrated, with little deviation under as much as 1.5% strain. The results show PEDOT/PSS can be a suitable material for printed bionic devices.
Nanostructured Electrically Conducting Biofibres Produced Using A Reactive Wet-Spinning Process, Javad Foroughi, Geoffrey M. Spinks, Gordon G. Wallace
Nanostructured Electrically Conducting Biofibres Produced Using A Reactive Wet-Spinning Process, Javad Foroughi, Geoffrey M. Spinks, Gordon G. Wallace
Australian Institute for Innovative Materials - Papers
Electrically conducting, robust fibres comprised of both an alginate (Alg) biopolymer and a polypyrrole (PPy) component have been produced using reactive wet-spinning. Using this approach polypyrrole-biopolymer fibres were also produced with single-walled carbon nanotubes (CNTs), added to provide additional strength and conductivity. The fibres produced containing CNTs show a 78% increase in ultimate stress and 25% increase in elongation to break compared to PPy-alginate fibre. These properties are essential for studies involving the use of electrical stimulation to promote nerve regrowth and/or muscle regeneration. The resultant a novel fibres had been evaluated to develop a viable system in incorporating biological …
Biomimetics And Materials With Multiple Personalities - The Foundation Of Next Generation Molecular Sensing Devices, Dermot Diamond, Robert P. Byrne, Fernando Benito-Lopez, John Cleary, Damien Maher, John Healy, Cormac Fay, Jung Ho Kim, King Tong Lau
Biomimetics And Materials With Multiple Personalities - The Foundation Of Next Generation Molecular Sensing Devices, Dermot Diamond, Robert P. Byrne, Fernando Benito-Lopez, John Cleary, Damien Maher, John Healy, Cormac Fay, Jung Ho Kim, King Tong Lau
Australian Institute for Innovative Materials - Papers
A strategy for advancing the price-performance capabilities of autonomous chemical sensor platforms is outlined. The importance of parallel efforts into the production of robust sensing platforms capable of autonomous monitoring of important environmental targets, while also generating potentially disruptive technologies based on fundamental materials science research is emphasised.
Terahertz Emission From Inp, Stuart Hargreaves, Roger A. Lewis
Terahertz Emission From Inp, Stuart Hargreaves, Roger A. Lewis
Australian Institute for Innovative Materials - Papers
We investigate the generation of THz radiation by the application of ultra-short near-infrared optical pulses to bulk unbiased InP. The THz radiation is detected in the direction of the specular reflection. While the overall emission characteristics are similar to those displayed by InAs under similar excitation conditions, in contrast to InAs, a single-cycle only variation in THz signal, of about ±20%, is observed as the sample is rotated through 360° around the surface normal.
Microwave Absorption Measurements Using Broad-Band Meanderline Approach, Ching-Ching Tsai, J Choi, Sunglae Cho, S J. Lee, Bimal K. Sarma, C Thompson, O Chernyashevskyy, Ivan Nevirkovets, J B. Ketterson
Microwave Absorption Measurements Using Broad-Band Meanderline Approach, Ching-Ching Tsai, J Choi, Sunglae Cho, S J. Lee, Bimal K. Sarma, C Thompson, O Chernyashevskyy, Ivan Nevirkovets, J B. Ketterson
Australian Institute for Innovative Materials - Papers
We describe a technique that permits broad-band, field-dependent ferromagnetic and electron paramagnetic resonance absorption measurements that is applicable to thin films and patterned micro-/nanostructured arrays and is based on a wire-wound meanderline approach. Techniques to prepare meanderlines and perform microwave measurements are described along with some demonstrations involving an electron paramagnetic resonance calibration/test material, 2,2-diphenyl-1-picryl-hydrazyl, and a ferromagnetic cobalt thin film.
The Role Of Optical Rectification In The Generation Of Terahertz Radiation From Gabias, Krunal Radhanpura, Stuart Hargreaves, Roger A. Lewis, M Henini
The Role Of Optical Rectification In The Generation Of Terahertz Radiation From Gabias, Krunal Radhanpura, Stuart Hargreaves, Roger A. Lewis, M Henini
Australian Institute for Innovative Materials - Papers
We report on a detailed study of the emission of terahertz-frequency electromagnetic radiation from layers of GaBiyAs1−y (0≤yBand (001) GaAs substrates. We measure two orthogonally polarized components of the terahertz radiation emitted under excitation by ultrashort near-infrared laser pulses in both transmission and reflection geometries as a function of the crystal rotation about its surface normal as well as the effect of in-plane magnetic field and pump fluence on the terahertz emission. We conclude that the principal mechanism for terahertz generation is via optical rectification rather than transient currents.
Microstructural And Compositional Analysis Of Strontium-Doped Lead Zirconate Titanate Thin Films On Gold-Coated Silicon Substrates, S Sriram, M Bhaskaran, D Rg Mitchell, K T. Short, A Holland, A Mitchell
Microstructural And Compositional Analysis Of Strontium-Doped Lead Zirconate Titanate Thin Films On Gold-Coated Silicon Substrates, S Sriram, M Bhaskaran, D Rg Mitchell, K T. Short, A Holland, A Mitchell
Australian Institute for Innovative Materials - Papers
This article discusses the results of transmission electron microscopy ~TEM!-based characterization of strontium-doped lead zirconate titanate ~PSZT! thin films. The thin films were deposited by radio frequency magnetron sputtering at 3008C on gold-coated silicon substrates, which used a 15 nm titanium adhesion layer between the 150 nm thick gold film and ~100! silicon. The TEM analysis was carried out using a combination of high-resolution imaging, energy filtered imaging, energy dispersive X-ray ~EDX! analysis, and hollow cone illumination. At the interface between the PSZT films and gold, an amorphous silicon-rich layer ~about 4 nm thick! was observed, with the film composition …
Nanocolumnar Preferentially Oriented Pszt Thin Films Deposited On Thermally Grown Silicon Dioxide, S Sriram, M Bhaskaran, A Mitchell, D Rg Mitchell, G Kostovski
Nanocolumnar Preferentially Oriented Pszt Thin Films Deposited On Thermally Grown Silicon Dioxide, S Sriram, M Bhaskaran, A Mitchell, D Rg Mitchell, G Kostovski
Australian Institute for Innovative Materials - Papers
We report the first instance of deposition of preferentially oriented, nanocrystalline, and nanocolumnar strontium-doped lead zirconate titanate (PSZT) ferroelectric thin films directly on thermal silicon dioxide. No intermediate seed or activation layers were used between PSZT and silicon dioxide. The deposited thin films have been characterised using a combination of diffraction and microscopy techniques.
Room Temperature Multiferroic Properties Of Nd: Bifeo3/Bi2femno6 Bilayered Films, Hongyang Zhao, Hideo Kimura, Zhenxiang Cheng, Xiaolin Wang, Takashi Nishida
Room Temperature Multiferroic Properties Of Nd: Bifeo3/Bi2femno6 Bilayered Films, Hongyang Zhao, Hideo Kimura, Zhenxiang Cheng, Xiaolin Wang, Takashi Nishida
Australian Institute for Innovative Materials - Papers
Nd0.1Bi0.9FeO3 /Bi2FeMnO6 bilayered films were deposited on Pt/Ti/SiO2 / Si substrate by pulsed laser deposition method. BiFeO3 is antiferromagnet while BiMnO3 is ferromagnet, the ordering of –Mn–O–Fe–O–Mn– is expected, which will induce the ferromagnetic interation in the film. The film shows typical ferromagnetic properties with the transition temperature of Tc of 440 K. The room temperature (RT) ferroelectric polarization was also observed, suggesting that the film is a promising RT multiferroism.