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Full-Text Articles in Engineering
Tunable Magnetic Anisotropy And Dzyaloshinskii-Moriya Interaction In An Ultrathin Van Der Waals Fe3gete2/In2se3 Heterostructure, Dong Chen, Wei Sun, Hang Li, Jian Li Wang, Yuanxu Wang
Tunable Magnetic Anisotropy And Dzyaloshinskii-Moriya Interaction In An Ultrathin Van Der Waals Fe3gete2/In2se3 Heterostructure, Dong Chen, Wei Sun, Hang Li, Jian Li Wang, Yuanxu Wang
Australian Institute for Innovative Materials - Papers
© Copyright © 2020 Chen, Sun, Li, Wang and Wang. The promise of future spintronic devices with nanoscale dimension, high-density, and low-energy consumption motivates the search for van der Waals heterostructure that stabilize topologically protected whirling spin textures such as magnetic skyrmions and domain walls. To translate these compelling features into practical devices, a key challenge lies in achieving effective manipulation of the magnetic anisotropy energy and the Dzyaloshinskii-Moriya (DM) interaction, the two key parameters that determine skyrmions. Through the first-principles calculation, we demonstrate that the polarization-induced broken inversion symmetry in the two-dimensional Fe3GeTe2/In2Se3 multiferroic heterostructure does cause an interfacial …
Biaxial Creep Test Study On The Influence Of Structural Anisotropy On Rheological Behaviour Of Hard Rock, Chuangzhou Wu, Qingsheng Chen, Sudip Basack, Riqing Xu, Zhenming Shi
Biaxial Creep Test Study On The Influence Of Structural Anisotropy On Rheological Behaviour Of Hard Rock, Chuangzhou Wu, Qingsheng Chen, Sudip Basack, Riqing Xu, Zhenming Shi
Faculty of Engineering and Information Sciences - Papers: Part A
Rheological characteristics are one of most important properties needed to be considered for the designing and construction for the long term stability and serviceability of underground structures in the rock mass. Up to date, although extensive studies on the rheological properties of rocks are available in the literature, most of existing studies reported the strain-time data for the axial deformation through compression rheological method and did not mention the lateral deformation, and mainly focused on the soft rocks at shallow depth. Thus, very limited attention has been paid to the rheological properties of deep and hard rock, neglecting the effects …
Complementary Terahertz Absorption And Inelastic Neutron Study Of The Dynamic Anisotropy Contribution To Zone-Center Spin Waves In A Canted Antiferromagnet Ndfeo3, Evan Constable, David L. Cortie, Josip Horvat, Roger A. Lewis, Zhenxiang Cheng, Guochu Deng, Shixun Cao, Shujuan Yuan, Guohong Ma
Complementary Terahertz Absorption And Inelastic Neutron Study Of The Dynamic Anisotropy Contribution To Zone-Center Spin Waves In A Canted Antiferromagnet Ndfeo3, Evan Constable, David L. Cortie, Josip Horvat, Roger A. Lewis, Zhenxiang Cheng, Guochu Deng, Shixun Cao, Shujuan Yuan, Guohong Ma
Australian Institute for Innovative Materials - Papers
We employ a combination of pulsed- and continuous-wave polarized terahertz spectroscopy techniques to probe temperature-dependent spin waves in the antiferromagnet NdFeO3. Our optical data span 1.6-467 K and reveal a conspicuous spin reorientation between 110 and 170 K, during which the lower-energy mode softens completely. Complementary inelastic neutron scattering reveals that the frequencies of the optically excited spin waves are consistent with a temperature-variable spin gap in the low-energy spin-wave dispersion of NdFeO3. The result links the temperature dependence of the spin waves to a dynamic in-plane anisotropy. The magnetic anisotropy is calculated based on the results of the optical …
Single-Pulse Terahertz Coherent Control Of Spin Resonance In The Canted Antiferromagnet Yfeo3, Mediated By Dielectric Anisotropy, Zuanming Jin, Zoltan Mics, Guohong Ma, Zhenxiang Cheng, Mischa Bonn, Dmitry Turchinovich
Single-Pulse Terahertz Coherent Control Of Spin Resonance In The Canted Antiferromagnet Yfeo3, Mediated By Dielectric Anisotropy, Zuanming Jin, Zoltan Mics, Guohong Ma, Zhenxiang Cheng, Mischa Bonn, Dmitry Turchinovich
Australian Institute for Innovative Materials - Papers
We report on the coherent control of terahertz (THz) spin waves in a canted antiferromagnet yttrium orthoferrite, YFeO3, associated with a quasiferromagnetic (quasi-FM) spin resonance at a frequency of 0.3 THz, using a single-incident THz pulse. The spin resonance is excited impulsively by the magnetic field component of the THz pulse. The intrinsic dielectric anisotropy of YFeO3 in the THz range allows for coherent control of both the amplitude and the phase of the excited spin wave. The coherent control is based on simultaneous generation of two interfering phase-shifted spin waves whose amplitudes and relative phase, dictated by the dielectric …
Anisotropy Of Crystal Growth Mechanisms, Dielectricity, And Magnetism Of Multiferroic Bi2femno6 Thin Films, P Liu, Z X. Cheng, Y Du, L Y. Feng, H Fang, Xiaolin Wang, S X. Dou
Anisotropy Of Crystal Growth Mechanisms, Dielectricity, And Magnetism Of Multiferroic Bi2femno6 Thin Films, P Liu, Z X. Cheng, Y Du, L Y. Feng, H Fang, Xiaolin Wang, S X. Dou
Australian Institute for Innovative Materials - Papers
Epitaxial Bi2FeMnO6 (BFMO) thin films deposited on various Nb:SrTiO3 substrates show that the lattice parameters are very sensitive to epitaxial strains. Compressive and tensile strains are induced to the in-plane lattice constants of the (100) and (111) oriented films, respectively, while that of the (110) oriented thin film stay unstrained. The thin films also exhibit a strongly anisotropic growth habit depending on the substrate. Spiral growth, such as in the (100) BFMO film, is unique in samples prepared by pulsed laser deposition. Extrinsic dielectric constants at low frequencies are attributed to oxygen vacancies via the Maxwell-Wagner effect. All the samples …
The Flux Pinning Mechanism, And Electrical And Magnetic Anisotropy In Fe1.04te0.6se0.4 Superconducting Single Crystal, Mahboobeh Shahbazi-Manshadi, Xiaolin Wang, S X. Dou, H Fang, C T. Lin
The Flux Pinning Mechanism, And Electrical And Magnetic Anisotropy In Fe1.04te0.6se0.4 Superconducting Single Crystal, Mahboobeh Shahbazi-Manshadi, Xiaolin Wang, S X. Dou, H Fang, C T. Lin
Australian Institute for Innovative Materials - Papers
The temperature and magnetic field dependences of the magnetization and critical current density of Fe1.04Te0.6Se0.4 single crystals have been investigated, and the flux pinning mechanism has been analysed. The normalized pinning force (fp Fp/F p,max) vs. h(H/Hirr) curves, are scaled using the Dew-Hughes theory, f(h) ≈ hp(1 - h)q with p 1.35 and q 3.06. The angular dependence of the resistivity under different magnetic fields shows a dip-like structure, below the superconducting transition temperature. The anisotropic value of 2 was obtained using Ginzburg-Landau theory.
Anisotropy In The Permeability And Consolidation Characteristics Of Dredged Mud, Dhanya Ganesalingam, Jayantha Ameratunga, Guy Schweitzer, Peter Boyle, Nagaratnam Sivakugan
Anisotropy In The Permeability And Consolidation Characteristics Of Dredged Mud, Dhanya Ganesalingam, Jayantha Ameratunga, Guy Schweitzer, Peter Boyle, Nagaratnam Sivakugan
Faculty of Engineering and Information Sciences - Papers: Part A
Dredging and land reclamation is a billion dollar industry that is spread around the coastal regions of Australia. Maintenance dredging is carried out regularly in many major Australian ports and in several cases the dredged mud is pumped ashore into containment paddocks at high water contents. When the dredged mud settles, there can be segregation with possible anisotropy. The sedimentation of the dredged mud is followed by self-weight consolidation which can take a long time. To accelerate the consolidation process, prefabricated vertical drains and surcharge are often used. To analyse the consolidation process of the dredged mud with vertical drains …
Giant Interlayer Magnetoresistances And Strong Anisotropy In P-Type Sb2te3 Single Crystals, Zengji Yue, Xiaolin Wang, S X. Dou
Giant Interlayer Magnetoresistances And Strong Anisotropy In P-Type Sb2te3 Single Crystals, Zengji Yue, Xiaolin Wang, S X. Dou
Australian Institute for Innovative Materials - Papers
Anisotropic interlayer magneto-transport properties have been studied over a broad range of temperatures and magnetic fields in p-type Sb2Te3 single crystals. Giant interlayer magnetoresistance (MR) of up to 400% was observed, which exhibits quadratic field dependences in low fields and becomes linear at high fields without any trend towards saturation. The interlayer MR displays strong anisotropy and is attributable to the anisotropy of the Fermi surface. The observed giant anisotropic interlayer MR could find applications in p-type Sb2Te3 based magneto-electronic devices.
Stretching Induced Hall Current And Conductance Anisotropy In Graphene, A R Wright, Chao Zhang
Stretching Induced Hall Current And Conductance Anisotropy In Graphene, A R Wright, Chao Zhang
Faculty of Engineering - Papers (Archive)
We evaluate the effect of stretching on the optical conductance of a single layer graphene sheet. It is found that the low energy (Dirac regime) isotropy that leads to the `universal conductance' is lost. More significantly, due to the loss of C_3 symmetry, a non-zero Hall conductance emerges for stretching along chiral directions, reaching a maximum at a stretching angle of 45 degrees, and being as high a S_0 = e2/4h at van Hove singular point for bond angle changes of about 2 degrees.
Magnetic Anisotropy Of Naxcoo2 Single Crystals, Dapeng Chen, Xiaolin Wang, C T Lin, S X. Dou
Magnetic Anisotropy Of Naxcoo2 Single Crystals, Dapeng Chen, Xiaolin Wang, C T Lin, S X. Dou
Australian Institute for Innovative Materials - Papers
We report the magnetic properties of single crystals of NaxCoO2 (x=0.42, 0.82, and 0.87). The magnetic susceptibility measurements revealed considerable anisotropy along H parallel to ab and H parallel to c for the as-grown single crystals. It was found that an antiferromagnetic transition with a Neel temperature T-N=21 K occurred for the x=0.82 sample, and there was a paramagnetic phase for the x=0.87 sample over a wide temperature range from 2 to 300 K, but the sample with x=0.42 shows a monotonic increase of chi with increasing temperature above similar to 100 K. In addition, …
Magnetic Anisotropy In Doped And Undoped Lifepo4 Single Crystals, Dapeng Chen, Xiaolin Wang, Y S Hu, C T Lin, S. X. Dou, Rashmi Nigam
Magnetic Anisotropy In Doped And Undoped Lifepo4 Single Crystals, Dapeng Chen, Xiaolin Wang, Y S Hu, C T Lin, S. X. Dou, Rashmi Nigam
Faculty of Engineering - Papers (Archive)
We report on the magnetic anisotropic properties of pure and Mg doped LiFePO4 single crystals grown by the traveling solvent floating zone technique. Our results reveal a considerable anisotropy in the susceptibilities along H‖a, H‖b, and H‖c for both crystals. LiFePO4 and Li0.99Mg0.01FePO4 crystals show antiferromagnetic long-range ordering below the Néel temperature of about 52 K, with the b axis being the magnetic easy axis. The effective moments have been determined to be 6.18μB and 6.07μB for the pure and the doped crystals, respectively. These values are higher than what is expected on the basis of the spin-only value of …
Coherent Rotation And Effective Anisotropy, Guoping Zhao, Xiaolin Wang, Y.P. Feng, C.W. Huang
Coherent Rotation And Effective Anisotropy, Guoping Zhao, Xiaolin Wang, Y.P. Feng, C.W. Huang
Faculty of Engineering - Papers (Archive)
It is shown in this paper that the concept of effective anisotropy is of sound physical sense only when the nucleation mode is coherent rotation. Comparison of coherent and incoherent nucleation fields demonstrates that the coherent rotation can take place at very small defect size. The critical size below which the coherent rotation is favorable is roughly the domain wall-width with 3-D soft defects and is smaller for oriented exchange-coupled permanent magnets with planar soft defects. The effect of misaligned grains has also been considered and it is illustrated that the effective anisotropy has to be used very carefully: it …