Article
Chemistry, Multidisciplinary
Irene Lucas, Noelia Marcano, Thomas Prokscha, Cesar Magen, Ruben Corcuera, Luis Morellon, Jose M. De Teresa, M. Ricardo Ibarra, Pedro A. Algarabel
Summary: This article provides a comprehensive magnetic characterization of the strain-induced segregated non-ferromagnetic layer (NFL), revealing spin glass behavior and confirming this through low-energy muon spectroscopy experiments.
Article
Physics, Applied
Haibin Shi, Yangtao Su, Yang Meng, Li Wang, Xinyu Cao, Hongwu Zhao
Summary: The study reveals that inserting a Ni81Fe19 (Py) layer at the YIG/Pt interface can enhance spin transmission efficiency. Comparative analysis of spin-mixing conductance dependent on Py thickness indicates that the enhancement is mainly attributed to spin fluctuations caused by the insertion of Py, rather than the interface magnetic moment density. However, the spin memory loss process arising from the Py interlayer partially suppresses the spin current, leading to an overall attenuation of spin transmission efficiency with increasing Py thickness.
APPLIED PHYSICS LETTERS
(2021)
Article
Physics, Multidisciplinary
Hassan Al-Hamdo, Tobias Wagner, Yaryna Lytvynenko, Gutenberg Kendzo, Sonka Reimers, Moritz Ruhwedel, Misbah Yaqoob, Vitaliy I. Vasyuchka, Philipp Pirro, Jairo Sinova, Mathias Klaeui, Martin Jourdan, Olena Gomonay, Mathias Weiler
Summary: We investigated the magnetization dynamics of Mn2Au/Py thin film bilayers and found two resonant modes that are attributed to the coupling between Py and Mn2Au.
PHYSICAL REVIEW LETTERS
(2023)
Article
Nanoscience & Nanotechnology
Yechao Ling, Yong Hu, Haobo Wang, Ben Niu, Jiawei Chen, Ruobai Liu, Yuan Yuan, Guangyu Wang, Di Wu, Mingxiang Xu, Zhida Han, Jun Du, Qingyu Xu
Summary: The study found that under the application of both tensile and compressive strains, all characteristic temperatures of Ni-Mn-Sn films can be significantly increased, and the exchange bias field and coercivity can be strongly strengthened. This is achieved through strain control of structural and magnetic properties, providing efficient manipulation for Heusler alloy-based magnetic devices.
ACS APPLIED MATERIALS & INTERFACES
(2021)
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
M. Wu, Y. Li, H. Luo, X. Liao, W. Liu, X. Huang, J. Shi, K. H. L. Zhang, T. Deng, Y. Du, J. Chen, D. Fu, H. -q. Wang, J. Kang
Summary: Element-specific XMCD and AHE were studied to investigate the magnetic and electronic structural evolutions of diverse proton-doping spinel NiCo2O4 films. The results revealed that proton-doping led to the reduction of Co valence state, resulting in the emergence of antiferromagnetic phase. Moreover, the magnetic anisotropy and orbital magnetic moment were decreased by proton-doping.
Article
Chemistry, Physical
R. N. Bhowmik, R. J. Choudhary, Priyanka Mitra, V. R. Reddy, A. K. Sinha
Summary: The study demonstrates the enhancement of ferromagnetic properties in Ga doped hematite thin films grown using Pulsed Laser Deposition technique, with unusual magnetic spin order and exchange bias effect observed at reduced dimensions (2D). Magnetic parameters such as magnetization and coercivity show dependence on composition, deposition conditions, and heat treatment. The chemical states of Fe ions in the films vary between high spin Fe3+ and Fe2+ states based on composition.
APPLIED SURFACE SCIENCE
(2022)
Article
Physics, Condensed Matter
Samta Manori, Ramesh Chandra
Summary: This study reports the observation of spin-glass behavior and large exchange bias effect in Fe-doped hexagonal-YMnO3 thin film at low temperature (-2 K). The presence of spin-glass state is confirmed by temperature dependent magnetization measurements, and the exchange bias effect is observed through hysteresis loop measurements. These findings provide insights into the interaction between spin-glass and anti-ferromagnetic phases.
PHYSICA B-CONDENSED MATTER
(2022)
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
Chemistry, Multidisciplinary
Mingwei Yang, Kuijuan Jin, Hongbao Yao, Qinghua Zhang, Yiru Ji, Lin Gu, Wenning Ren, Jiali Zhao, Jiaou Wang, Er-Jia Guo, Chen Ge, Can Wang, Xiulai Xu, Qiong Wu, Guozhen Yang
Summary: Various emergent phenomena are enabled by interface engineering in complex oxides heterostructures. Different magnetic behaviors, including ferromagnetic coupling, are observed in differently thick LMO films epitaxially deposited on substrates, shedding new lights on manipulating oxides functionality.
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
Materials Science, Multidisciplinary
Feng Wang, Wei Fu, Chengming Jiang, Junxiao Li, Jijie Huang
Summary: This study deposited (LaFeO3)(x):(La0.7Ca0.3MnO3)(1-x) composite thin films via pulsed laser deposition (PLD) and investigated the exchange bias effect. LaFeO3 is an antiferromagnet while La0.7Ca0.3MnO3 is a ferromagnet, resulting in exchange bias interfacial coupling at the FM/AFM interface. The composition variation in the composite system could tune the exchange bias field (H-EB).
Article
Crystallography
Zhixian Zhao, Ying Huang, Dan Li
Summary: Homogeneous Au doped crystalline Mn4N films were successfully grown on MgO (100) substrates, exhibiting spin-glass behaviors and giant exchange bias effects.
JOURNAL OF CRYSTAL GROWTH
(2022)
Article
Physics, Applied
M. A. Sousa, Andre Honorato, Isabel L. C. Merino, F. J. Litterst, Edson C. C. Passamani, Magda Fontes, Elisa Baggio-Saitovitch
Summary: In this study, we investigated the influence of the superconducting state on the magnetic properties of an IrMn/NiFe bilayer deposited on a YBCO substrate. The experimental results demonstrated that the superconducting state of the YBCO substrate strongly affects the magnetic anisotropy of the NiFe layer.
JOURNAL OF APPLIED PHYSICS
(2022)
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
Physics, Applied
Yu-Chi Liu, Chi-Nan Wu, Liang-Juan Chang, Yu-Ting Fanchiang, Chun-Chih Tseng, Minghwei Hong, Shang-Fan Lee, Jueinai Kwo
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2020)
Article
Chemistry, Multidisciplinary
Liang-Juan Chang, Jilei Chen, Danru Qu, Li-Zai Tsai, Yen-Fu Liu, Ming-Yi Kao, Jun-Zhi Liang, Tsuei-Shin Wu, Tien-Ming Chuang, Haiming Yu, Shang-Fan Lee
Article
Chemistry, Multidisciplinary
Jeongheon Choe, David Lujan, Martin Rodriguez-Vega, Zhipeng Ye, Aritz Leonardo, Jiamin Quan, T. Nathan Nunley, Liang-Juan Chang, Shang-Fan Lee, Jiaqiang Yan, Gregory A. Fiete, Rui He, Xiaoqin Li
Summary: Through investigating the phonon spectra of MnBi2Te4, we found the effects of couplings between electron, spin, and lattice on the material properties, and observed an increase in electron-phonon coupling with decreasing sample thickness.
Article
Chemistry, Multidisciplinary
Wei-Jhih Zou, Meng-Xin Guo, Jyun-Fong Wong, Zih-Ping Huang, Jui-Min Chia, Wei-Nien Chen, Sheng-Xin Wang, Keng-Yung Lin, Lawrence Boyu Young, Yen-Hsun Glen Lin, Mohammad Yahyavi, Chien-Ting Wu, Horng-Tay Jeng, Shang-Fan Lee, Tay-Rong Chang, Minghwei Hong, Jueinai Kwo
Summary: The quantum anomalous Hall effect has been realized at elevated temperatures in topological insulator-based heterostructures using the approach of magnetic proximity effect. Large anomalous Hall resistance has been achieved through interface tuning, and coexistence of topological Hall effect-like feature with the anomalous Hall effect has been observed.
Article
Multidisciplinary Sciences
David Lujan, Jeongheon Choe, Martin Rodriguez-Vega, Zhipeng Ye, Aritz Leonardo, T. Nathan Nunley, Liang-Juan Chang, Shang-Fan Lee, Jiaqiang Yan, Gregory A. Fiete, Rui He, Xiaoqin Li
Summary: MnBi2Te4 is a van der Waals material with both topological electron bands and magnetic order. The study shows that magnetic fluctuations increase as the thickness of the samples decreases, indicating a less robust magnetic order. In a bilayer with non-trivial topology, the characteristics of the magnons change as an external magnetic field tunes the ground state.
NATURE COMMUNICATIONS
(2022)
Article
Materials Science, Multidisciplinary
M. X. Guo, C. K. Cheng, Y. C. Liu, C. N. Wu, W. N. Chen, T. Y. Chen, C. T. Wu, C. H. Hsu, S. Q. Zhou, C. F. Chang, L. H. Tjeng, S. F. Lee, C. F. Pai, M. Hong, J. Kwo
Summary: In this study, single-crystal EuIG thin films were successfully grown on GGG substrates using epitaxial growth method, and exhibited strain-induced perpendicular magnetic anisotropy. By adjusting the sputtering conditions, the composition ratios of Eu/Fe in the films were varied to control the film strains. The films had smooth, particle-free surface with excellent crystallinity and a stable interface connection.
PHYSICAL REVIEW MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Ravish K. Jain, Li-Zai Tsai, Bo-Chien Huang, Liang-Juan Chang, Jun-Zhi Liang, Yu-Hui Tang, Shang-Fan Lee
Summary: The transmission of spin waves through a magnetic domain wall was studied, and it was found that the transmission ratio decreases with increasing spin wave frequency and approaches isotropic behavior at higher frequencies.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Dong Seob Kim, Di Huang, Chunhao Guo, Kejun Li, Dario Rocca, Frank Y. Gao, Jeongheon Choe, David Lujan, Ting-Hsuan Wu, Kung-Hsuan Lin, Edoardo Baldini, Li Yang, Shivani Sharma, Raju Kalaivanan, Raman Sankar, Shang-Fan Lee, Yuan Ping, Xiaoqin Li
Summary: A long-standing pursuit in materials science is to identify suitable magnetic semiconductors for integrated information storage, processing, and transfer. Van der Waals magnets have brought forth new material candidates for this purpose. Recently, sharp exciton resonances in antiferromagnet NiPS3 have been reported to correlate with magnetic order, that is, the exciton photoluminescence intensity diminishes above the Neel temperature. Here, it is found that the polarization of maximal exciton emission rotates locally, revealing three possible spin chain directions. This study shows that anisotropic exciton photoluminescence can be used to read out local spin chain directions in antiferromagnets and realize multi-functional devices via spin-photon transduction.
ADVANCED MATERIALS
(2023)
Article
Engineering, Electrical & Electronic
Erh-Chen Lin, Yu-Ting Lin, Cheng-Tse Chou, Chun-An Chen, Yun-Jei Wu, Po-Han Chen, Shang-Fan Lee, Chia-Seng Chang, Yung-Fu Chen, Yi-Hsien Lee
Summary: The study demonstrates an enhanced magnetoresistance effect in synthesized WTe2 single crystals. High crystallinity and tunable thickness of WTe2 single crystals are achieved by promoter-assisted chemical vapor deposition. The magnetoresistance of WTe2 shows a nonsaturating behavior with a positive MR of similar to 2000% at 2 K and a large MR of similar to 50% at 80 K.
ACS APPLIED ELECTRONIC MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
T. Nathan Nunley, Side Guo, Liang-Juan Chang, David Lujan, Jeongheon Choe, Shang-Fan Lee, Fengyuan Yang, Xiaoqin Li
Summary: Recent research has found that thulium iron garnet (TmIG) based bilayers show promise in realizing small skyrmions at room temperature. By directly measuring the magnetic hysteresis loops, researchers have determined that the spin Hall topological Hall resistivity is considerably larger than previously estimated values. This finding further confirms the existence of skyrmions at room temperature and near-zero applied magnetic fields.
Article
Physics, Multidisciplinary
T. C. Chuang, D. Qu, S. Y. Huang, S. F. Lee
PHYSICAL REVIEW RESEARCH
(2020)
Article
Materials Science, Multidisciplinary
Po-Hsun Wu, Yen-Chang Tu, Danru Qu, Hsia-Ling Liang, Shang-Fan Lee, Ssu-Yen Huang
Article
Chemistry, Multidisciplinary
Thai Duy Ha, Min Yen, Yu-Hong Lai, Chang-Yang Kuo, Chien-Te Chen, Arata Tanaka, Li-Zai Tsai, Yi-Feng Zhao, Chun-Gang Duan, Shang-Fan Lee, Chun-Fu Chang, Jenh-Yih Juang, Ying-Hao Chu
Article
Materials Science, Multidisciplinary
Neil Murray, Wei-Bang Liao, Ting-Chien Wang, Liang-Juan Chang, Li-Zai Tsai, Tsung-Yu Tsai, Shang-Fan Lee, Chi-Feng Pai
Article
Materials Science, Multidisciplinary
S. R. Yang, Y. T. Fanchiang, C. C. Chen, C. C. Tseng, Y. C. Liu, M. X. Guo, M. Hong, S. F. Lee, J. Kwo