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It was experimentally observed that both magnetic anisotropy and spin-orbit interaction strength change when the magnetization of the nanomagnet is reversed. This indicates a variation in spin-orbit interaction strength depending on whether…

介观与纳米尺度物理 · 物理学 2024-07-10 Vadym Zayets

Systematic approach has been applied to obtain the boundary conditions for magnetization at an interface between ferromagnetic (FM) and antiferromagnetic (AFM) materials in the continuous medium approximation. Three order parameters are…

应用物理 · 物理学 2019-02-01 Oksana Busel , Oksana Gorobets , Yuri Gorobets

The anisotropy of the Fe-based superconductors is much smaller than that of the cuprates and the theoretical calculations. A credible understanding for this experimental fact is still lacking up to now. Here we experimentally study the…

超导电性 · 物理学 2017-06-28 Yonghui Ma , Qiucheng Ji , Kangkang Hu , Bo Gao , Wei Li , Gang Mu , Xiaoming Xie

The generalized Fisher super-exchange antiferromagnetic model with uniaxial crystal-field anisotropy is exactly investigated using an extended mapping technique. An exact relation between partition function of the studied system and that…

统计力学 · 物理学 2007-05-23 Lucia Canova , Michal Jascur

The interface between organic semiconductor [OSC]/ferromagnetic [FM] material can exhibit ferromagnetism due to their orbital hybridization. Charge/spin transfer may occur from FM to OSC layer leading to the formation of `spinterface' i.e.…

The magnetic properties of a series of YBa2Cu3O7-x/La2/3Ca1/3MnO3 (YBCO/LC1/3MO) superlattices grown by dc sputtering at high oxygen pressures (3.5 mbar) show the expected ferromagnetic behaviour. However, field cooled hysteresis loops at…

材料科学 · 物理学 2009-11-10 N. Haberkorn , J. Guimpel , M. Sirena , L. B. Steren , W. Saldarriaga , E. Baca , M. E. Gómez

In this work, IrMn$_{3}$/insulating-Y$_{3}$Fe$_{5}$O$_{12}$ exchange-biased bilayers are studied. The behavior of the net magnetic moment $\Delta m_{AFM}$ in the antiferromagnet is directly probed by anomalous and planar Hall effects, and…

材料科学 · 物理学 2014-10-09 X. Zhou , L. Ma , Z. Shi , W. J. Fan , R. F. L. Evans , R. W. Chantrell , S. Mangin , H. W. Zhang , S. M. Zhou

We present a comprehensive study of the exchange bias effect in a model system. Through numerical analysis of the exchange bias and coercive fields as a function of the antiferromagnetic layer thickness we deduce the absolute value of the…

材料科学 · 物理学 2010-06-14 S. K. Mishra , F. Radu , S. Valencia , D. Schmitz , E. Schierle , H. A. Dürr , W. Eberhardt

The effect of interface roughness of ferromagnetic and antiferromagnetic layers on exchange bias is still not well understood. In this report we have investigated the effect of surface roughness in (111)-oriented antiferromagnetic CoO films…

Collinear antiferromagnets (AFs) support two degenerate magnon excitations carrying opposite spin polarizations, by which magnons can function as electrons in various spin-related phenomena. In an insulating ferromagnet(F)/AF/F trilayer, we…

介观与纳米尺度物理 · 物理学 2018-11-21 Ran Cheng , Di Xiao , Jian-Gang Zhu

Temperature dependent Ferromagnetic Resonance measurements performed as a function of diameter on Nickel nanowire arrays reveal several interesting features in these systems. With diameter decrease from 100 nm to 15 nm, a transition induced…

材料科学 · 物理学 2015-03-13 C. Tannous , A. Ghaddar , J. Gieraltowski

Inter-Landau-level transitions in the bilayer graphene at high perpendicular magnetic field at the filling-factor v<<1 have been studied. The next-nearest-neighbor transitions, energy difference between dimer and non-dimer sites and layer…

介观与纳米尺度物理 · 物理学 2015-05-27 V. E. Bisti , N. N. Kirova

We present a detailed magnetic study of the Pr1/3Ca2/3MnO3 manganite, where we observe the presence of small ferromagnetic (FM) domains (diameter ~ 10A) immersed within the charge-ordered antiferromagnetic (AFM) host. Due to the interaction…

材料科学 · 物理学 2009-11-11 D. Niebieskikwiat , M. B. Salamon

The properties of antiferromagnetic ferromagnetic bilayer have been studied using self-consistent mean-field approximation for Heisenberg Hamiltonian. The perpendicular exchange coupling has been revealed in a bilayer with a compensated…

材料科学 · 物理学 2009-11-11 N. A. Usov , S. A. Gudoshnikov

To identify the possible mechanism of coercivity (Hc) degradation of Nd-Fe-B sintered magnets, we study the roles of the exchange field acting on the 4f electrons in Nd ions and theoretically investigate how the variation of the exchange…

材料科学 · 物理学 2015-06-23 Ryo Sasaki , Daisuke Miura , Akimasa Sakuma

Exploring novel systems with perpendicular magnetic anisotropy (PMA) is vital for advancing memory devices. In this study, we report an intriguing PMA system involving an ultrathin Fe layer on an antiferromagnetic (AFM) CoO(001) surface.…

We consider theoretically the effects of an applied uniform magnetic field on the magnetic spectrum of anisotropic two-dimensional and Dzyaloshinskii-Moriya layered quantum Heisenberg antiferromagnets. The first case is relevant for systems…

强关联电子 · 物理学 2007-05-23 L. Benfatto , M. B. Silva Neto

The influence of uniaxial single-ion anisotropy -DSz^2 on the magnetic and thermal properties of Heisenberg antiferromagnets (AFMs) is investigated. The uniaxial anisotropy is treated exactly and the Heisenberg interactions are treated…

强关联电子 · 物理学 2017-05-15 David C. Johnston

We study the ferromagnetic layer thickness dependence of the voltage-controlled magnetic anisotropy (VCMA) in gated CoFeB/MgO heterostructures with heavy metal underlayers. When the effective CoFeB thickness is below ~1 nm, the VCMA…

材料科学 · 物理学 2017-01-17 Yong-Chang Lau , Peng Sheng , Seiji Mitani , Daichi Chiba , Masamitsu Hayashi

We introduce a minimal interface-scattering mechanism that produces a sizable anisotropic magnetoresistance (AMR) in metal/ferromagnet bilayers (e.g., Pt/YIG) without invoking bulk spin or orbital Hall currents. In a $\delta$-layer model…

介观与纳米尺度物理 · 物理学 2025-10-17 Ivan Iorsh , Mikhail Titov