Article
Physics, Applied
D. M. Polishchuk, T. Polek, V. Yu Borynskyi, A. F. Kravets, A. Tovstolytkin, V Korenivski
Summary: The exchange biasing in ferromagnet/antiferromagnet bilayers can enhance the ferromagnetic resonance frequency and eliminate the angle dependence, showing the potential for high-speed spintronic applications.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2021)
Article
Chemistry, Physical
Young Chan Won, Sang Ho Lim
Summary: The study investigates the perpendicular magnetic anisotropy and crystalline structure of Ta/NiFeB/MgO stacks. Annealing induces PMA and increases magnetic moment, with the thinnest 0.5-nm Ta layer showing the strongest PMA at 400 degrees Celsius. X-ray diffraction confirms the formation of NiFe (001) phase essential for high tunneling magnetoresistance ratio.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Chun- Lu, Shang-An Wang, Kristan Bryan Simbulan, Chak-Ming Liu, Xiao Wang, Guoqiang Yu, Wen-Chin Lin, Ting-Hua Lu, Yann-Wan Lan
Summary: The study demonstrates a new all-optical switching method utilizing a continuous-wave Laguerre-Gaussian beam to modify magnetic anisotropy, paving the way for the development of magnetic-based spintronics using light with orbital angular momentum.
NANOSCALE HORIZONS
(2021)
Article
Multidisciplinary Sciences
You Ba, Shihao Zhuang, Yike Zhang, Yutong Wang, Yang Gao, Hengan Zhou, Mingfeng Chen, Weideng Sun, Quan Liu, Guozhi Chai, Jing Ma, Ying Zhang, Huanfang Tian, Haifeng Du, Wanjun Jiang, Cewen Nan, Jia-Mian Hu, Yonggang Zhao
Summary: Our work demonstrates the electric-field control of skyrmions through strain-mediated magnetoelectric coupling in ferromagnetic/ferroelectric multiferroic heterostructures. Experimental results show non-volatile creation and annihilation of multiple skyrmions, indicating potential for more energy-efficient spintronics.
NATURE COMMUNICATIONS
(2021)
Article
Materials Science, Multidisciplinary
P. T. Tho, N. Tran, N. T. M. Hong, N. N. Tran, L. T. Ha, P. T. Phong, D. V. Karpinsky, C. T. A. Xuan
Summary: The external magnetic field is used to control the spin states at the phase boundary in BiFeO3-based ceramics. The spin states can transform from unfrustrated to frustrated under a magnetic field larger than a critical value, leading to an increase in net magnetization during a sweep decrease of magnetic field. The frustrated spin states form a ferromagnetic configuration and interact with intrinsic antiferromagnetic spins, resulting in vertical magnetization shift, field step-dependent hysteresis loop, and training effects. The unique properties of the spin states at the phase boundary allow for control of coercivity and magnetization by magnetic field.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Dimitrios Anyfantis, Camillo Ballani, Nikos Kanistras, Alexandros Barnasas, Vassilios Kapaklis, Georg Schmidt, Evangelos Th Papaioannou, Panagiotis Poulopoulos
Summary: The study demonstrates that the fabrication method and doping elements of Ni0.95Fe0.05/NiFeO multilayers have important influences on their layering quality and magnetic properties. Mild thermal annealing enhances the perpendicular magnetic anisotropy of the multilayers, leading to a considerable improvement in magnetic performance.
Article
Engineering, Electrical & Electronic
Jing Ming Liang, Xu Wen Zhao, Sheung Mei Ng, Hon Fai Wong, Yu Kuai Liu, Chee Leung Mak, Chi Wah Leung
Summary: We report a study on the interfacial antiferromagnetic coupling between ferrimagnetic TbIG/YIG thin films. The temperature and directional dependences of the antiferromagnetic coupling effect are observed at low temperatures. This work enriches the magnetic research of ferrimagnetic oxide films with complex structures and provides new ideas for the design of antiferromagnetically coupled spintronics devices.
IEEE TRANSACTIONS ON MAGNETICS
(2022)
Article
Nanoscience & Nanotechnology
Fernando Ajejas, Yanis Sassi, William Legrand, Titiksha Srivastava, Sophie Collin, Aymeric Vecchiola, Karim Bouzehouane, Nicolas Reyren, Vincent Cros
Summary: Room-temperature stabilization of densely packed sub-60 nm diameter skyrmions at zero-field is achieved in ferromagnetic multilayers by finely tuning the multilayer parameters and utilizing interlayer electronic coupling to an adjacent bias magnetic layer. This method enables the reduction or cancellation of external field requirements, which is important for skyrmion-based applications such as memories and computing.
Article
Multidisciplinary Sciences
Chun-Liang Yang, Chih-Huang Lai
Summary: Synthetic antiferromagnets with Ru/Re composite spacers exhibit superior thermal stability and coupling strength, enhancing the compatibility of back-end of line process and perpendicular magnetic tunneling junctions. Through interfacial engineering, the performance of SAFs can be fine-tuned to enhance the process compatibility of P-MTJs to the CMOS process.
SCIENTIFIC REPORTS
(2021)
Article
Chemistry, Physical
Dimitrios I. Anyfantis, Camillo Ballani, Nikos Kanistras, Alexandros Barnasas, Ioannis Tsiaoussis, Georg Schmidt, Evangelos Th. Papaioannou, Panagiotis Poulopoulos
Summary: Co/CoO multilayers were fabricated using radio-frequency magnetron sputtering. Platinum was used as buffer and capping layers, as well as an ultrathin intermediate layer to enhance perpendicular magnetic anisotropy. Three samples were compared based on magnetic anisotropies and exchange bias. The use of a magnetic substrate resulted in loops with large remanence and significant exchange bias. These samples have potential applications in spintronics and magnetic storage.
Article
Materials Science, Multidisciplinary
Juliana Besler, Spencer Myrtle, Erol Girt
Summary: This paper demonstrates that IrFe spacer layers can control the noncollinear interlayer exchange coupling between ferromagnetic Co layers over a larger composition and thickness range than any other spacer layer materials. The Co|IrFe|Co structures studied exhibit bilinear coupling strength, J1, above 2 mJ/m2 and biquadratic coupling strength, J2, above 1 mJ/m2 over a wide range of spacer layer compositions and thicknesses. After annealing, orthogonal coupling is favored, which has potential applications in magnetic sensor devices.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Sadhana Singh, Avinash G. Khanderao, Mukul Gupta, Ilya Sergeev, H. C. Wille, Kai Schlage, Marcus Herlitschke, Dileep Kumar
Summary: The origin of exchange bias (EB) in orthogonal magnetic anisotropic systems is studied by investigating the magnetization reversal of a soft ferromagnetic Fe layer coupled to a [Co/Pt](ML) multilayer with perpendicular magnetic anisotropy (PMA). The study reveals that the exchange coupling at the [Co/Pt](ML) and Fe interface leads to a considerable shift in the Fe layer hysteresis loop and an unusual increase in coercivity, similar to EB phenomena. The analysis using magneto-optical Kerr effect (MOKE) and isotope selective grazing incident nuclear resonance scattering (GINRS) technique further reveals a unidirectional pinning of the Fe layer due to the net in-plane magnetic spin at the interface caused by magnetic field annealing.
Review
Physics, Multidisciplinary
Qirui Cui, Liming Wang, Yingmei Zhu, Jinghua Liang, Hongxin Yang
Summary: In this review, the authors comprehensively survey three types of basic terms related to spin interactions in 2D magnets: magnetic anisotropy, exchange coupling, and Dzyaloshinskii-Moriya interaction (DMI). The physical features and origins of these terms are introduced, along with many correlated phenomena, which are significant for the advancement of 2D spintronics.
FRONTIERS OF PHYSICS
(2023)
Article
Nanoscience & Nanotechnology
Mingzhen Feng, Nolan Ahlm, Dayne Y. Sasaki, I-Ting Chiu, Alpha T. N'Diaye, Padraic Shafer, Christoph Klewe, Apurva Mehta, Yayoi Takamura
Summary: This work explores the effect of adjusting the thickness of La2/3Sr1/3CoO3 (LSCO) and La2/3Sr1/3MnO3 (LSMO) layers on the magnetocrystalline anisotropy and exchange bias in epitaxial LSCO/LSMO bilayers. The results show significant variations in the easy axis direction and exchange coupling between LSCO and LSMO layers at different thicknesses.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Physics, Multidisciplinary
Xinwei Feng, Jing Meng, Xiaoyan Zhu, Kelei Xue, Yali Xie, Dongmei Jiang, Yang Xu, Tian Shang, Yong Hu, Qingfeng Zhan
Summary: We observed a fourfold magnetic anisotropy induced by interfacial exchange coupling in ferromagnetic/antiferromagnetic bilayers, which can be nicely fitted by a phenomenological model. This additional anisotropy is caused by the presence of two types of antiferromagnetic domains, resulting in different effects on the magnetization.
NEW JOURNAL OF PHYSICS
(2023)
Article
Chemistry, Physical
C. Favieres, J. Vergara, C. Magen, M. R. Ibarra, V. Madurga
JOURNAL OF ALLOYS AND COMPOUNDS
(2016)
Article
Materials Science, Multidisciplinary
J. Vergara, C. Favieres, V Madurga
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2019)
Article
Chemistry, Physical
Cristina Favieres, Jose Vergara, Vicente Madurga
Article
Chemistry, Inorganic & Nuclear
Cristina Favieres, Jose Vergara, Vicente Madurga
Summary: The magnetic and transport properties of pulsed laser-deposited Co100-x-Cu-x thin films can be tailored through their nano-morphology and composition by controlling the deposition geometry and Cu content. The presence and size of textured Cu nanocrystals increase with higher Cu content. Obliquely deposited films exhibit controllable in-plane uniaxial magnetic anisotropy, while normally deposited films show no in-plane magnetic anisotropy.
Article
Chemistry, Physical
C. Favieres, J. Vergara, C. Magen, M. R. Ibarra, V. Madurga
Summary: In this study, the effects of oriented nano-sheets generated during the growth of cobalt-rich Co-V and Co-Zn thin films on magnetic and transport properties were investigated. It was found that the anisotropy of the nano-sheet morphology resulted in noticeable shape anisotropy in the films. Thermal treatments caused changes in the nano-morphology and the associated anisotropic properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
J. Vergara, C. Favieres, V Madurga
Summary: Hard magnetic MnBi films were obtained through appropriate heat treatments. Magnetic measurements and MFM confirmed the correlation between magnetic domains and MnBi grains in the film. Extra Mn layers did not affect the structure and magnetism significantly, while the addition of Bi layers changed the magnetic structure of MnBi grains.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2022)
Article
Chemistry, Inorganic & Nuclear
Jose Vergara, Cristina Favieres, Vicente Madurga
Summary: Pulsed laser-deposited (PLD) MnBi films were fabricated by alternating deposition of Mn and Bi layers, followed by heat treatments. The resistance of the films showed a steep decrease with increasing temperature, simultaneous to the onset of the formation of the ferromagnetic MnBi phase. The annealed samples exhibited ferromagnetic behavior and characteristic LT-MnBi phase diffraction peaks in the X-ray diffraction patterns. The temperature of the MnBi phase generation decreased with increasing Bi atomic concentration.
Article
Physics, Applied
C. Favieres, J. Vergara, V. Madurga
Summary: Fe films with nano-sheet morphology demonstrated high uniaxial magnetic, transport, and optical in-plane anisotropies. The films showed clear easy and hard directions of magnetization, with the anisotropy field dependent on film thickness. The resistance and reflectivity of the films also exhibited anisotropic behaviors.
JOURNAL OF APPLIED PHYSICS
(2023)
Editorial Material
Chemistry, Inorganic & Nuclear
Cristina Favieres
Article
Chemistry, Physical
Jose Vergara, Cristina Favieres, Cesar Magen, Jose Maria de Teresa, Manuel Ricardo Ibarra, Vicente Madurga
