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Recently we have demonstrated the presence of spin-orbit toque in FeMn/Pt multilayers which, in combination with the anisotropy field, is able to rotate its magnetization consecutively from 0o to 360o without any external field. Here, we…

Materials Science · Physics 2017-06-28 Ziyan Luo , Yumeng Yang , Yanjun Xu , Mengzhen Zhang , Baoxi Xu , Jingsheng Chen , Yihong Wu

We have used high-resolution neutron spectroscopy experiments to determine the complete spin wave spectrum of the heavy fermion antiferromagnet CeRhIn$_5$. The spin wave dispersion can be quantitatively reproduced with a simple $J_1$-$J_2$…

Strongly Correlated Electrons · Physics 2014-12-19 Pinaki Das , S. -Z. Lin , N. J. Ghimire , K. Huang , F. Ronning , E. D. Bauer , J. D. Thompson , C. D. Batista , G. Ehlers , M. Janoschek

Strong, adjustable magnetic couplings are of great importance to all devices based on magnetic materials. Controlling the coupling between adjacent regions of a single magnetic layer, however, is challenging. In this work, we demonstrate…

Mesoscale and Nanoscale Physics · Physics 2023-03-28 Zhentao Liu , Zhaochu Luo , Ivan Shorubalko , Christof Vockenhuber , Laura J. Heyderman , Pietro Gambardella , Aleš Hrabec

Magnetisation dynamics in exchange spring magnets have been studied using simulations of the FePt/Fe bilayer system. The FePt hard layer exhibits strong perpendicular magnetocrystalline anisotropy, while the soft (Fe) layer has negligible…

Mesoscale and Nanoscale Physics · Physics 2010-06-29 Pedro M. S. Monteiro , D. S. Schmool

The electronic structure and magnetic exchange interactions in pure and V-doped Fe16N2 are studied within the framework of density functional theory. The Curie temperatures were obtained with both mean field approximation (MFA) as well as…

Materials Science · Physics 2018-10-24 Satadeep Bhattacharjee , Seung-Cheol Lee

High tunability of two dimensional magnetic materials (by strain, gating, heterostructuring or otherwise) provides unique conditions for studying versatile magnetic properties and controlling emergent magnetic phases. Expanding the scope of…

Computational Physics · Physics 2020-07-07 Raí M. Menezes , Clécio C. de Souza Silva , Milorad V. Milošević

Few-layer CrI$_3$ is the most known example among two-dimensional (2D) ferromagnets, which have attracted growing interest in recent years. Despite considerable efforts and progress in understanding the properties of 2D magnets both from…

Strongly Correlated Electrons · Physics 2021-01-14 I. V. Kashin , V. V. Mazurenko , M. I. Katsnelson , A. N. Rudenko

The low-temperature behavior of the static magnetic susceptibility $\chi(T)$ of exchange-disordered antiferromagnetic spin chains is investigated. It is shown that for a relatively small and even number of spins in the chain, two exchange…

In this study, we explore the influence of interlayer exchange coupling on magnetization reversal triggered by femtosecond laser pulses in ferromagnetic spin valves. Our experiments, focused on femtosecond laser-induced magnetization…

Magnetic properties of Ga$_{1-x}$Mn$_x$N are studied theoretically by employing a tight binding approach to determine exchange integrals $J_{ij}$ characterizing the coupling between Mn spin pairs located at distances $R_{ij}$ up to the 16th…

Materials Science · Physics 2014-07-14 C. Simserides , J. A. Majewski , K. N. Trohidou , T. Dietl

Magnetic thin films at ferromagnetic resonance (FMR) leak angular momentum, which may be absorbed by adjacent layers. This phenomenon, known as spin pumping, is manifested by an increase in the resonance linewidth ($\Delta H$), and the…

Mesoscale and Nanoscale Physics · Physics 2017-09-08 Masoumeh Fazlali , Martina Ahlberg , Mykola Dvornik , Johan Åkerman

We have put into evidence the existence of an antiferromagnetic coupling between iron epilayers separated by a ZnSe crystalline semiconductor. The effect has been observed for ZnSe spacers thinner than 4 nm at room-temperature. The coupling…

We have measured the superconducting transition temperature T_c of F/S/F trilayers using Permalloy (Py=Ni_84 Fe_16) as a strongly polarized ferromagnetic material. For a parallel (P) or anti-parallel (AP) alignment of the magnetization…

Superconductivity · Physics 2012-08-27 Ion C. Moraru , W. P. Pratt, , Norman O. Birge

We study the non-collinear exchange coupling across a trilayer magnetic junction consisting of two ferromagnets separated by a thin dilute magnetic semiconductor containing itinerant carriers with finite spin relaxation. It is remarkable…

Materials Science · Physics 2007-05-23 J. E. Bunder , Hsiu-Hau Lin

Ferrimagnetic materials with a compensation temperature have recently attracted interest because of their unique combination of ferromagnetic and antiferromagnetic properties. However, their magnetization dynamics near the compensation…

Using spin-polarized low-energy electron microscopy to study magnetization in epitaxial layered systems, we found that the area vs perimeter relationship of magnetic domains in the top Fe layers of Fe/NiO/Fe(100) structures follows a…

Materials Science · Physics 2008-01-08 N. Rougemaille , M. Portalupi , A. Brambilla , P. Biagioni , A. Lanzara , M. Finazzi , A. K. Schmid , L. Duò

The electronic structure of the ferromagnetic semiconductor EuO is investigated by means of spin- and angle-resolved photoemission spectroscopy (spin-ARPES) and density functional theory. EuO exhibits unique properties of hosting both…

The collective behavior of spins in a dilute magnetic semiconductor is determined by their mutual interactions and influenced by the underlying crystal structure. Hence, we begin with the atomic quantum-mechanical description of this system…

Materials Science · Physics 2010-10-12 Agnieszka Werpachowska , Tomasz Dietl

Employing first principles electronic structure calculations in conjunction with the frozen-magnon method we calculate exchange interactions, spin-wave dispersion, and spin-wave stiffness constants in inverse-Heusler-based spin gapless…

Materials Science · Physics 2015-05-15 A. Jakobsson , P. Mavropoulos , E. Sasioglu , S. Blugel , M. Lezaic , B. Sanyal , I. Galanakis

In this work we focus on magnetic relaxation in Mn$_{80}$Ir$_{20}$(12 nm)/ Cu(6 nm)/ Py($d_\mathrm{F}$) antiferromagnet/Cu/ferromagnet (AFM/Cu/FM) multilayers with different thickness of the ferromagnetic permalloy layer. An effective…