Article
Materials Science, Ceramics
Xiaoxia Lin, Jianlin Wang, Zhengping Fu, Qiuping Huang, Yalin Lu
Summary: GaFeO3-type iron oxide, a promising multiferroic material, was synthesized by introducing FM Fe3O4 into AFM GaFeO3 to form an FM-AFM interface, leading to the observation of an exchange bias effect. This study offers a new perspective on the potential applications of the GaFeO3-type family in spintronic devices.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2021)
Article
Materials Science, Multidisciplinary
R. Hissariya, V. G. Sathe, S. K. Mishra
Summary: La2-x SmxNiMnO6 (x = 0, 0.1, 0.2) polycrystalline compounds were synthesized through the sol-gel process using all-aqueous precursors. The magnetic properties of La2-xSmxNiMnO6 (LSNMO) compounds with Sm-substitution were investigated through X-ray diffraction, magnetization measurements, and Raman spectroscopy. The results show that Sm-substitution improves the phase stability of LSNMO and induces a structural phase transformation. The magnetic measurements reveal a metastable spin-glass state and a reduction in Curie temperature with Sm-doping. Raman spectroscopy confirms the reduction of antisite disorder with Sm-addition.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2023)
Article
Physics, Condensed Matter
Haiou Wang, Hui Zhang, Yan Wang, Weishi Tan, Dexuan Huo
Summary: By integrating Pt/LMO heterostructure, this study investigates emergent phenomena at interfaces, revealing unexpected ferromagnetic behavior, spin glass state, and exchange bias effect. The relationship among these phenomena is explained by the coupling between the spin glass and antiferromagnetic phases.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2021)
Article
Materials Science, Multidisciplinary
Sarah Jenkins, Roy W. Chantrell, Richard F. L. Evans
Summary: Antiferromagnetic materials have the potential for high-speed, high-density spintronic devices, but reliable detection of their state is challenging. Exchange bias can help with this detection. Intermixing at the interfaces between ferromagnetic and antiferromagnetic layers plays a crucial role in determining the spin state and key parameters in exchange-biased systems.
Article
Nanoscience & Nanotechnology
Fanghua Tian, Xiaoqin Ke, Kaiyan Cao, Dingchen Wang, Qizhong Zhao, Jianing Li, Zhiyong Dai, Dong Wang, Yin Zhang, Chao Zhou, Yu Wang, Wenliang Zuo, Minxia Fang, Sen Yang
Summary: The properties of materials are heavily influenced by the size of domains/grains, showing a non-monotonic relationship. In bulk Ni2Mn1+xGa1-x alloys, the exchange bias effect is influenced by the size of ferromagnetic clusters and can be regulated by changing the density of the FM/AFM interface.
Article
Physics, Condensed Matter
Guang Yu, Hanxiao Chen, Shengcan Ma, Xiaohua Luo, Chaofei Liu, Changcai Chen, Chunsheng Fang, Yongwen Yuan, Xinyu Ye, Zhenchen Zhong
Summary: In this work, a Mn-vacancy polycrystalline tetragonal Heusler sample Mn1.89Pt0.98Ga1.12 is fabricated. The existence of a reentrant spin glass state and spontaneous exchange bias is confirmed. Furthermore, a robust and low field topological Hall effect is achieved, indicating the possible existence of non-coplanar spin configuration.
PHYSICA B-CONDENSED MATTER
(2022)
Article
Physics, Multidisciplinary
Dapeng Zhu, Tianrui Zhang, Xiao Fu, Runrun Hao, Amir Hamzic, Huaiwen Yang, Xueying Zhang, Hui Zhang, Ao Du, Danrong Xiong, Kewen Shi, Shishen Yan, Shufeng Zhang, Albert Fert, Weisheng Zhao
Summary: Recent studies have shown that antiferromagnetic insulators efficiently support spin current. In this study, we observe a strong temperature dependence and reversed sign of dampinglike spin-orbit torque (SOT) in Pt/NiO/CoFeB, which is different from the slight variation with temperature observed in Pt/CoFeB bilayer. The negative dampinglike SOT at low temperatures is proposed to be mediated by magnetic interactions tied to the "exchange bias" in Pt/NiO/CoFeB, in contrast to the thermal-magnon-mediated scenario at high temperatures. These results highlight the potential to control SOT by tuning the magnetic structure in multilayers.
PHYSICAL REVIEW LETTERS
(2022)
Article
Physics, Applied
Kyuhwe Kang, Won-Bin Lee, Dong-Kyu Lee, Kyung-Jin Lee, Gyung-Min Choi
Summary: The study demonstrates that a short-pulsed spin current can induce fast dynamics of metallic antiferromagnets via spin-transfer torque on the magnetization of sublattices, using two methods to generate the spin current. Results provide evidence of the direct interaction between the magnetization of antiferromagnets and spin current.
APPLIED PHYSICS LETTERS
(2021)
Article
Physics, Applied
Canglong Li, Wenqian Yang, Yang Lu, Ya Yang, Chunlei Wang, Qiankun Lei, Yang Qiu, Yongsong Luo
Summary: The present experiments show that inverse exchange bias and negative magnetization can be observed simultaneously in Gd(2)Co(0.5)Mn(1.5)O(6) below the ferrimagnetic compensation point T-comp. The slower relaxation of frozen spins compared to rotatable spins confirms the intrinsic nature of the inverse exchange bias. The amplitude of the exchange bias field (H-EB) is inversely proportional to the cooling field (H-cool), and the inverse exchange bias is observed up to 50 kOe. The observed exchange bias can be attributed to the flipping of inverse ferromagnetic moments below T-comp by adjusting the amplitude or direction of the applied magnetic field.
APPLIED PHYSICS LETTERS
(2023)
Article
Physics, Applied
Jiahao Liu, Zhiwei Wen, Yajing Cui, Yong Zhao, Yongliang Chen
Summary: Doped SrFeO3-delta has abundant physical properties and wide applications. The crystal structure, magnetic properties, and other characteristics of SrFe1-xCuxO3-delta samples were investigated.
JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM
(2022)
Article
Materials Science, Multidisciplinary
W. G. Zheng, V. Baledent, L. Bocher, A. Forget, D. Colson, P. Foury-Leylekian
Summary: In this study, an exchange bias effect with a large vertical shift in the field-cooled hysteresis loop was observed in the spin ladder system BaFe2Se3 below 50 K. The existence of uncompensated spins was evidenced by susceptibility, magnetic remanence, and hysteresis loop measurements. A nanometer-sized layered structure was also observed by scanning electron microscope (SEM) and confirmed by scanning transmission electron microscope (STEM) coupled with electron energy loss spectroscopy (EELS).
Article
Chemistry, Multidisciplinary
Dhoha Alshalawi, Jose Maria Alonso, Angel R. Landa-Canovas, Patricia de la Presa
Summary: In this study, the structural and magnetic properties of LaFeO3 were investigated as a function of particle size ranging from bulk to nanoscale. It was found that the presence of twins decreased as the particle size decreased, which could be attributed to the softening of FeO6 distortion. The spin canting observed in the bulk sample disappeared for smaller particle sizes, possibly due to the reduction in orthorhombic distortion. Additionally, when the particle size was less than 60 nm, a significant exchange effect bias appeared, resulting from the combination of spin glass and antiferromagnetism.
Article
Chemistry, Multidisciplinary
Yibo Fan, Xiang Han, Xiaonan Zhao, Yanan Dong, Yanxue Chen, Lihui Bai, Shishen Yan, Yufeng Tian
Summary: This study investigates the IrMn/Co/Ru/CoPt/CoO heterojunction as a potential candidate for multistate memory and programmable spin logic. It demonstrates 10 states of nonvolatile memory and multiple logic-in-memory functions.
Article
Materials Science, Multidisciplinary
Suman Kalyan Pradhan, Raktim Datta, Subham Majumdar, Mintu Mondal, Subodh Kumar De
Summary: The effect of partial electron doping (10% Fe) in the antiferromagnetic double perovskite La2CuIrO6 has been studied, revealing a significant modification in the microscopic magnetic interaction and the emergence of strong ferromagnetic ordering. The interaction among different magnetic orderings results in a cluster-glass state and novel zero-field-cooled exchange bias and conventional exchange bias effects at low temperature.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2022)
Article
Chemistry, Physical
Alexander Omelyanchik, Franciscarlos Gomes da Silva, Guilherme Gomide, Ivan Kozenkov, Jerome Depeyrot, Renata Aquino, Alex Fabiano Cortez Campos, Dino Fiorani, Davide Peddis, Valeria Rodionova, Sonja Jovanovi
Summary: The study investigated the structural and magnetic properties of iron oxide nanoparticles obtained by the precipitation of iron ions in the presence of different amounts of citric acid. It was found that the particle size plays a crucial role in determining the magnetic properties, with smaller particles showing reduced saturation magnetization and increased coercivity due to the increasing role of the disordered surface. The observation of superspin-glass freezing, memory effects, and exchange bias in smaller particles provides evidence of unique magnetic behaviors at the nanoscale.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Nanoscience & Nanotechnology
L. Ma, Y. Zhang, H. Zhao, H. R. Fu, M. Tang, H. L. Yang, Z. Shi, N. Tian, C. Y. You
Article
Physics, Applied
Weijia Fan, Jie Zhao, Meng Tang, Huanjian Chen, Huanglin Yang, Weiming Lu, Zhong Shi, Xuepeng Qiu
PHYSICAL REVIEW APPLIED
(2019)
Article
Physics, Applied
Huanjian Chen, Dashuai Cheng, Huanglin Yang, Daike Wang, Shiming Zhou, Zhong Shi, Xuepeng Qiu
APPLIED PHYSICS LETTERS
(2020)
Article
Physics, Applied
Zhong Shi, Shi-Jie Xu, Li Ma, Shi-Ming Zhou, Guang-Yu Guo
PHYSICAL REVIEW APPLIED
(2020)
Article
Physics, Applied
L. Ma, H. R. Fu, M. Tang, X. P. Qiu, Z. Shi, C. Y. You, N. Tian, Jian-Guo Zheng
APPLIED PHYSICS LETTERS
(2020)
Article
Physics, Multidisciplinary
Zhong Shi, Qing Xi, Junxue Li, Yufei Li, Mohammed Aldosary, Yadong Xu, Jun Zhou, Shi-Ming Zhou, Jing Shi
Summary: The spin Seebeck effect (SSE) signal of magnon polarons in bulk-Y3Fe5O12 (YIG)/Pt heterostructures shows a transition from a dip to a peak as temperature increases, attributed to the rapid rise of the four-magnon scattering rate. This analysis offers important insights into the microscopic origin of hybridized excitations and the overall temperature dependence of SSE anomalies.
PHYSICAL REVIEW LETTERS
(2021)
Article
Materials Science, Multidisciplinary
W. B. Rui, Zhen Zheng, Moritz M. Hirschmann, Song-Bo Zhang, Chenjie Wang, Z. D. Wang
Summary: We have discovered three-dimensional intertwined Weyl phases by developing a theory for creating topological phases. These intertwined phases exhibit unconventional Weyl semimetallic and higher-order topological characteristics, and their key feature is the exotic intertwining. On 2D surfaces, the intertwining causes a periodic change in the Fermi-arc topology against surface orientation.
NPJ QUANTUM MATERIALS
(2022)
Article
Physics, Multidisciplinary
W. B. Rui, Zhen Zheng, Chenjie Wang, Z. D. Wang
Summary: This study explores the non-Hermitian spatial symmetries and their impact on normal and exceptional semimetals, highlighting the global constraints on band degeneracies and topological quantities enforced by these symmetries. The research demonstrates the unique characteristics of non-Hermitian spatial symmetries in comparison to Hermitian ones through specific models.
PHYSICAL REVIEW LETTERS
(2022)
Article
Physics, Applied
Yuanyang Du, Jiebin Peng, Zhong Shi, Jie Ren
Summary: We investigate the control of near-field radiative heat transfer between two hyperbolic antiferromagnetic insulators by twist and magnetic fields. The heat flux can be affected by both the twist angle and the magnetic field magnitude, with different symmetries. External magnetic fields cause a nonmonotonic change in the radiative heat flux, with a minimum flux at around 1.5T. This behavior is due to the field changing the nature of magnon polaritons with time-reversal symmetry breaking. We propose a twist-induced thermal switch device that can regulate radiative heat flux through different magnetic fields, with implications for efficient thermal management.
PHYSICAL REVIEW APPLIED
(2023)
Article
Materials Science, Multidisciplinary
W. B. Rui, Y. X. Zhao, Z. D. Wang
Summary: The study reveals that the complex energy bands of non-Hermitian systems can braid in momentum space even in one dimension, providing a foundation for Hermitian topological physics with chiral symmetry. A new elegant identity is derived, equating the linking number between the knots of braiding non-Hermitian bands and the zero-energy loop to the topological invariant of chiral-symmetric topological phases. Furthermore, an exotic class of phase transitions arising from the critical point transforming different knot structures of the non-Hermitian braiding is discovered, which is not included in conventional Hermitian topological phase transition theory.
Article
Materials Science, Multidisciplinary
W. B. Rui, Song-Bo Zhang, Moritz M. Hirschmann, Zhen Zheng, Andreas P. Schnyder, Bjoern Trauzettel, Z. D. Wang
Summary: This study reveals that higher-order Weyl superconductors can be realized in odd-parity topological superconductors with time-reversal symmetry being broken by periodic driving. Unlike traditional Weyl points, the higher-order Weyl points in the bulk separate different topological phases, and their projections on the surface are connected by hinge Majorana arcs. The anisotropic connectivity of hinge Majorana arcs is identified as a characteristic feature of higher-order Weyl materials.
Article
Physics, Multidisciplinary
S. Ikegaya, W. B. Rui, D. Manske, Andreas P. Schnyder
Summary: Majorana corner modes in two-dimensional (s + p)-wave superconductors can be manipulated by the direction of an in-plane magnetic field, while edge imperfections affect their number and controllability. Tunneling spectroscopy shows distinct periodicity of zero-bias differential conductance with respect to the magnetic field direction in the presence of Majorana corner modes in this setup.
PHYSICAL REVIEW RESEARCH
(2021)
Article
Materials Science, Multidisciplinary
Ting Fu, Shuangfeng Li, Xiaoyu Feng, Yongwei Cui, Jiguang Yao, Bo Wang, Jiangwei Cao, Zhong Shi, Desheng Xue, Xiaolong Fan
Summary: In this study, anomalies in the complex Hall effect near the magnetization compensation temperature of CoGd alloy films were systematically investigated. The occurrence of a topological Hall effect was ruled out through detailed magnetic and transport measurements, leading to the construction of a phenomenological model to explain the complex Hall effect based on the influence of spin-flop effect and component inhomogeneity. This research provides insights into the microscopic magnetic properties and transport properties of rare-earth transition metal ferrimagnetic alloys near the compensation point.
Article
Physics, Multidisciplinary
Song-Bo Zhang, W. B. Rui, Alessio Calzona, Sang-Jun Choi, Andreas P. Schnyder, Bjorn Trauzettel
PHYSICAL REVIEW RESEARCH
(2020)
Article
Physics, Multidisciplinary
Q. Xi, B. Liu, Z. Shi, T. Nakayama, J. Zhou, B. Li
