Open Access. Powered by Scholars. Published by Universities.®
- Discipline
Articles 1 - 12 of 12
Full-Text Articles in Entire DC Network
Interfacial Contributions To Anomalous Hall Effect In Perpendicular Magnetic Anisotropic [Co2mnsi/Pd]3 Multilayer, Huarui Fu, Caiyin You, Li Ma, Na Tian, Fangqing Xin, Zhenxiang Cheng, Adham Basha, Amit Kohn
Interfacial Contributions To Anomalous Hall Effect In Perpendicular Magnetic Anisotropic [Co2mnsi/Pd]3 Multilayer, Huarui Fu, Caiyin You, Li Ma, Na Tian, Fangqing Xin, Zhenxiang Cheng, Adham Basha, Amit Kohn
Australian Institute for Innovative Materials - Papers
Through engineering the interface between Co2MnSi and Pd, we realize a high perpendicular magnetic anisotropy (PMA) and controllable anomalous Hall effect (AHE) in [Co2MnSi(tCMS)/Pd]3multilayers. The multilayers are characterized by a particulatelike layer morphology following annealing at 573 K with weak B2 crystallographic ordering of the Co2MnSi layer. The largest PMA (Keff) of 1.2x106erg/cm3 has been obtained in [Co2MnSi(1.2nm)/Pd]3 multilayer annealed at 573 K. The AHE can be tuned, which we attribute to a varying proximity effect at the Co2MnSi/Pd interface, by varying the annealing temperature and Co2MnSi thickness. According to the expanded AHE scaling relation, we calculate the different contributions …
Exchange Interaction Mediated Ferroelectricity In Multiferroic Mntio3 With Anisotropic Orbital Hybridization And Hole Delocalization, Shiwei Chen, Paoan Lin, Horngtay Jeng, S W. Fu, Jennmin Lee, Jyhfu Lee, Chihwen Pao, Hirofumi Ishii, Kuding Tsuei, Nozomu Hiraoka, Dapeng Chen, S X. Dou, Xiaolin Wang, Kueihtzu Lu, Jinming Chen
Exchange Interaction Mediated Ferroelectricity In Multiferroic Mntio3 With Anisotropic Orbital Hybridization And Hole Delocalization, Shiwei Chen, Paoan Lin, Horngtay Jeng, S W. Fu, Jennmin Lee, Jyhfu Lee, Chihwen Pao, Hirofumi Ishii, Kuding Tsuei, Nozomu Hiraoka, Dapeng Chen, S X. Dou, Xiaolin Wang, Kueihtzu Lu, Jinming Chen
Australian Institute for Innovative Materials - Papers
We present the orbital structure of MnTiO3 with polarization dependent x-ray absorption and resonant x-ray emission spectra accompanied with electronic structure calculations. The results clearly indicate a strongly anisotropic O 2p-Mn 3d orbital hybridization whereas the Mn 3d hole state shows a highly delocalized characteristic ascribed to the 3d-4p mixing. The extended Mn 4p orbital could enhance the exchange interaction between Mn (3d)-O (2p)-Mn (3d) leading to an asymmetric charge distribution in Mn-O bonds. The delocalized characteristic of Mn 3d holes is indispensable to the mechanism of spin-dependent-metal-ligand hybridization to explain magnetically induced ferroelectricity.
Closed-Orbit Dependence On The Field Direction In The Anisotropic Diamagnetic Kepler Problem, A Bruno-Alfonso, Colin Bleasdale, Gustavo Alvarez, R A. Lewis
Closed-Orbit Dependence On The Field Direction In The Anisotropic Diamagnetic Kepler Problem, A Bruno-Alfonso, Colin Bleasdale, Gustavo Alvarez, R A. Lewis
Faculty of Engineering and Information Sciences - Papers: Part A
The classical orbits of an electron with anisotropic mass interacting with a Coulomb center in the presence of a magnetic field are investigated. It is shown that the shape and duration of the closed orbits depend on the magnetic-field direction. Reasonable agreement with available experimental results for donor-doped silicon samples in a magnetic field is found, when the energy value of the conduction electron is appropriately chosen.
Espi Filtering Method Based On Anisotropic Coherence Diffusion And Perona-Malik Diffusion, Zhitao Xiao, Zhenbei Xu, Fang Zhang, Lei Geng, Jun Wu, Quan Yuan, Jiangtao Xi
Espi Filtering Method Based On Anisotropic Coherence Diffusion And Perona-Malik Diffusion, Zhitao Xiao, Zhenbei Xu, Fang Zhang, Lei Geng, Jun Wu, Quan Yuan, Jiangtao Xi
Faculty of Engineering and Information Sciences - Papers: Part A
Noise reduction is one of the most important concerns in electronic speckle pattern interferometry (ESPI). According to partial differential equation (PDE) filtering theory, we present an anisotropic PDE noise- reduction model based on fringe structure information for interferometric fringe patterns. This model is based on coherence diffusion and Perona-Malik (P-M) diffusion. The former can protect the structure information of fringe pattern, while the latter can effectively filter off the noise inside the fringes. The proposed model generated by the two diffusion methods helps to obtain good effects of denoising and fidelity. ESPI fringes and the phase pattern are tested. Experimental …
Formulation Of Cross-Anisotropic Failure Criterion For Soils, Yi-Fei Sun, Han-Long Liu, Gui Yang, Yang Xiao
Formulation Of Cross-Anisotropic Failure Criterion For Soils, Yi-Fei Sun, Han-Long Liu, Gui Yang, Yang Xiao
Faculty of Engineering and Information Sciences - Papers: Part A
Inherently anisotropic soil fabric has a considerable influence on soil strength. To model this kind of inherent anisotropy, a three-dimensional anisotropic failure criterion was proposed, employing a scalar-valued anisotropic variable and a modified general threedimensional isotropic failure criterion. The scalar-valued anisotropic variable in all sectors of the deviatoric plane was defined by correlating a normalized stress tensor with a normalized fabric tensor. Detailed comparison between the available experimental data and the corresponding model predictions in the deviatoric plane was conducted. The proposed failure criterion was shown to well predict the failure behavior in all sectors, especially in sector II with …
Anisotropic Coupled Diffusion Filter And Binarization For The Electronic Speckle Pattern Interferometry Fringes, Fang Zhang, Zhitao Xiao, Jun Wu, Lei Geng, Hongqiang Li, Jiangtao Xi, Jin Jiang Wang
Anisotropic Coupled Diffusion Filter And Binarization For The Electronic Speckle Pattern Interferometry Fringes, Fang Zhang, Zhitao Xiao, Jun Wu, Lei Geng, Hongqiang Li, Jiangtao Xi, Jin Jiang Wang
Faculty of Informatics - Papers (Archive)
In this paper novel approaches based on anisotropic coupled diffusion equations are presented to do filter and binarization for ESPI fringes. An advantageous characteristic associated with the proposed technique is that diffusion takes place mainly along the direction of the edge. Therefore, the proposed anisotropic coupled diffusion filter method can avoid blur of the fringe edge and protect the useful information of the fringe patterns. The anisotropic coupled diffusion binarization, which can repair the image boundary anisotropically, is able to avoid the redundant burr. More important, it can be directly applied to the noisy ESPI fringe patterns without much preprocessing, …
Anisotropic And Excellent Magnetocaloric Properties Of La 0.7ca0.3mno3 Single Crystal With Anomalous Magnetization, J.C Debnath, Rong Zeng, Jung Ho Kim, Dapeng Chen, S X. Dou
Anisotropic And Excellent Magnetocaloric Properties Of La 0.7ca0.3mno3 Single Crystal With Anomalous Magnetization, J.C Debnath, Rong Zeng, Jung Ho Kim, Dapeng Chen, S X. Dou
Australian Institute for Innovative Materials - Papers
Magnetic properties and the magnetocaloric effect (MCE) have been investigated in La0.7Ca0.3MnO3 single crystal with applied field along both the ab-plane and the c-direction. Due to the magnetocrystalline anisotropy, the crystal exhibits anisotropy in the MCE. Upon application of a 5 T field, the magnetic entropy changes (SM), reaching values of 7.668 J/(kg K) and 6.412 J/(kg K) for both the ab-plane and the c-direction, respectively. A magnetic entropy change of 3.3 J/(kg K) was achieved for a magnetic field change of 1.5 T at the Curie temperature, TC = 245 K. Due to the absence of grains in the …
Enhanced Optical Conductance In Graphene Superlattice Due To Anisotropic Band Dispersion, Yee Sin Ang, Chao Zhang
Enhanced Optical Conductance In Graphene Superlattice Due To Anisotropic Band Dispersion, Yee Sin Ang, Chao Zhang
Faculty of Engineering and Information Sciences - Papers: Part A
The optical response of a Kronig-Penney type graphene superlattice is investigated. When an external field is applied along the periodicity of the superlattice, the total optical response of the graphene superlattice is enhanced due to the formation of anisotropic Dirac fermions. Such anisotropy tunes up the total optical spectra while maintaining the same critical electric field regardless of the degree of anisotropy. The optical conductance of anisotropic Dirac fermions exhibits two contrasting behaviours: (i) inversely proportional to the anisotropy and (ii) directly proportional to the anisotropy, depending on the direction of the external field. Interestingly, the anisotropy-induced optical conductance enhancement …
Giant And Anisotropic Magnetoresistances In P-Type Bi-Doped Sb 2te 3 Bulk Single Crystals, Z J. Yue, Xiaolin Wang, Y Du, S M. Mahboobeh, Frank F. Yun, Z X. Cheng, S. X. Dou
Giant And Anisotropic Magnetoresistances In P-Type Bi-Doped Sb 2te 3 Bulk Single Crystals, Z J. Yue, Xiaolin Wang, Y Du, S M. Mahboobeh, Frank F. Yun, Z X. Cheng, S. X. Dou
Faculty of Engineering - Papers (Archive)
Antimony telluride (Sb2Te3) compounds are well known as excellent thermoelectric materials and have been recently confirmed as three-dimensional topological insulators. In this letter, we have investigated the anisotropic magneto-transport properties of p-type Bi-doped Sb2Te3 bulk single crystals over a broad range of temperatures, degrees and magnetic fields. Giant magnetoresistance (MR) of up to 230% was observed, which exhibits quadratic field dependences in low fields and becomes linear at high fields without any trend towards saturation. The giant MR also shows strong anisotropy with anisotropy ratio up to 210% in angle-dependent measurements. The …
Anisotropic Matern Correlation And Spatial Prediction Using Reml, K A. Haskard, Brian R. Cullis, A P. Verbyla
Anisotropic Matern Correlation And Spatial Prediction Using Reml, K A. Haskard, Brian R. Cullis, A P. Verbyla
Faculty of Informatics - Papers (Archive)
The Mat´ern correlation function provides great flexibility for modeling spatially correlated random processes in two dimensions, in particular via a smoothness parameter, whose estimation allows data to determine the degree of smoothness of a spatial process. The extension to include anisotropy provides a very general and flexible class of spatial covariance functions that can be used in a model-based approach to geostatistics, in which parameter estimation is achieved via REML and prediction is within the E-BLUP framework. In this article we develop a general class of linear mixed models using an anisotropic Mat´ern class with an extended metric. The approach …
Anisotropic Atomic Motions In High-Resolution Protein Crystallography Molecular Dynamics Simulations, Conrad J. Burden, Aaron J. Oakley
Anisotropic Atomic Motions In High-Resolution Protein Crystallography Molecular Dynamics Simulations, Conrad J. Burden, Aaron J. Oakley
Faculty of Science - Papers (Archive)
Molecular dynamics (MD) simulations using empirical force fields are popular for the study of proteins. In this work, we compare anisotropic atomic fluctuations in nanosecond-timescale MD simulations with those observed in an ultra-high-resolution crystal structure of crambin. In order to make our comparisons, we have developed a compact graphical technique for assessing agreement between spatial atomic distributions determined by MD simulations and observed anisotropic temperature factors.
Single-Crystal Growth And Anisotropic Magnetic Properties Of Nonstoichiometric Three-Layer Sodium Cobalt Oxides, Dapeng Chen, Xiaolin Wang, C T Lin, S X. Dou
Single-Crystal Growth And Anisotropic Magnetic Properties Of Nonstoichiometric Three-Layer Sodium Cobalt Oxides, Dapeng Chen, Xiaolin Wang, C T Lin, S X. Dou
Australian Institute for Innovative Materials - Papers
Large single crystals of α-NaxCoO2 (x=0.91, 0.92, and 0.93) have been successfully fabricated by using the traveling solvent floating zone method. Details on the crystal growth are discussed. The crystal structures were characterized using powder x-ray diffraction and Rietveld refinement. The magnetic susceptibility measurements show that the magnetic properties depend strongly on x. The compound was found to be antiferromagnetic at TN ≈ 20 K for x=0.91 and x=0.92, and paramagnetic for x=0.93. The in-plane and out-of-plane anisotropies were observed for the x=0.91 crystals. In addition, the derived anisotropic g-factor ratios (gab /gc) …