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The issue of interlayer exchange coupling in magnetic multilayers with superconducting (SC) spacer is addressed in La$_{0.67}$Sr$_{0.33}$MnO$_{3}$ (LSMO) - YBa$_{2}$Cu$_{3}$O$_{7}$ (YBCO) - La$_{0.67}$Sr$_{0.33}$MnO$_{3}$ (LSMO) epitaxial…

Superconductivity · Physics 2009-11-11 K. Senapati , R. C. Budhani

A key element to tailor the properties of magnetic multilayers is the coupling between the individual magnetic layers. In case of skyrmion hosting multilayers, coupling of skyrmions across the magnetic layers is highly desirable. Here the…

The FMR linewidth and its anisotropy in F$_1$/f/F$_2$/AF multilayers, where spacer f has a low Curie point compared to the strongly ferromagnetic F$_1$ and F$_2$, is investigated. The role of the interlayer exchange coupling in…

Mesoscale and Nanoscale Physics · Physics 2016-08-31 A. F. Kravets , D. M. Polishchuk , Yu. I. Dzhezherya , A. I. Tovstolytkin , V. O. Golub , V. Korenivski

We propose a magnetic multilayer layout, in which the indirect exchange coupling (IEC also known as RKKY) can be switched on and off by a slight change in temperature. We demonstrate such on/off IEC switching in a Fe/Cr/FeCr-based system…

Applied Physics · Physics 2018-10-18 D. M. Polishchuk , Yu. O. Tykhonenko-Polishchuk , A. F. Kravets , V. Korenivski

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

Employing first-principles electronic structure calculations in conjunction with the frozen-magnon method we study the effective exchange interactions and spin waves in local moment ferromagnets. As prototypes we have chosen three…

Materials Science · Physics 2012-10-30 I. Galanakis , E. Sasioglu

Using a density functional method with explicit account for strong Coulomb repulsion within the 4f shell, we calculate effective exchange parameters and the corresponding ordering temperatures of the (ferro)magnetic insulating Eu…

Strongly Correlated Electrons · Physics 2009-11-10 J. Kunes , Wei Ku , W. E. Pickett

We describe a systematic study of the exchange coupling between a magnetically hard metallic ferromagnet (MnAs) and a magnetically soft ferromagnetic semiconductor (GaMnAs) in bilayer and trilayer heterostructures. An exchange spring model…

Materials Science · Physics 2015-05-13 M. J. Wilson , M. Zhu , R. C. Myers , D. D. Awschalom , P. Schiffer , N. Samarth

Exchange coupling between two magnetic layers through an interlayer is of broad interest for numerous recent applications of nano-magnetic systems. In this Letter we study ferromagnetic exchange coupling through amorphous paramagnetic Fe-Ta…

Materials Science · Physics 2013-04-11 Matthias Gottwald , Jimmy J. Kan , Kangho Lee , Seung H. Kang , Eric E. Fullerton

Magnetic proximity effect between topological insulator (TI) and ferromagnetic insulator (FMI) is considered to have great potential in spintronics. However, a complete determination of interfacial magnetic structure has been highly…

Mesoscale and Nanoscale Physics · Physics 2015-04-13 Mingda Li , Wenping Cui , Jin Yu , Zuyang Dai , Zhe Wang , Ferhat Katmis , Wanlin Guo , Jagadeesh Moodera

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

We use neutron reflectometry to investigate the interlayer exchange coupling between Ga$_{0.97}$Mn$_{0.03}$As ferromagnetic semiconductor layers separated by non-magnetic Be-doped GaAs spacers. Polarized neutron reflectivity measured below…

Strongly Correlated Electrons · Physics 2009-11-13 J. -H. Chung , S. J. Chung , Sanghoon Lee , B. J. Kirby , J. A. Borchers , Y. J. Cho , X. Liu , J. K. Furdyna

Magnetization switching in ferromagnets has so far been limited to the current-induced spin-orbit-torque effects. Recent observation of helicity-independent all-optical magnetization switching in exchange-coupled ferromagnet ferrimagnet…

Materials Science · Physics 2023-04-26 Debanjan Polley , Jyotirmoy Chatterjee , Hyejin Jang , Jeffrey Bokor

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 investigate switching of magnetic tunnel junctions (MTJs) driven by the thermal effect of the transport current through the junctions. The switching occurs in a specially designed composite free layer, which acts as one of the MTJ…

Mesoscale and Nanoscale Physics · Physics 2018-01-17 A. F. Kravets , D. M. Polishchuk , V. A. Pashchenko , A. I. Tovstolytkin , V. Korenivski

Perpendicular exchange bias has been manipulated by changing ferromagnetic film thickness and spacer layer in Pt/Co/(Pt, Cr)/CoO thin films. The exchange bias characteristics, blocking temperature, magnetization of thin films strongly…

Mesoscale and Nanoscale Physics · Physics 2018-12-03 N. Akdogan , A. Yagmur , M. Ozturk , E. Demirci , O. Ozturk , M. Erkovan

We calculate the Curie temperature of layered ferromagnets, chromium tri-iodide (CrI3), chromium tri-bromide (CrBr3), chromium germanium tri-telluride (CrGeTe3), and the Neel temperature of a layered anti-ferromagnet iron di-chloride…

Mesoscale and Nanoscale Physics · Physics 2021-01-27 Sabyasachi Tiwari , Maarten L Van de Put , Bart Soree , William G. Vandenberghe

Spin-wave resonance measurements were performed in the mixed magnetic phase regime of a Pd-doped FeRh epilayer that appears as the first-order ferromagnetic-antiferromagnetic phase transition takes place. It is seen that the measured value…

Josephson junctions containing ferromagnetic materials exhibit interesting physics and show promise as circuit elements for superconducting logic and memory. For memory applications, the properties of the junction should be controllable by…

Superconductivity · Physics 2022-07-27 Swapna Sindhu Mishra , Robert M. Klaes , Joshua Willard , Reza Loloee , Norman O. Birge

We report on a general principle using the interlayer exchange coupling to extend the regime of chiral magnetic films in which stable or metastable magnetic skyrmions can appear at zero magnetic field. We verify this concept on the basis of…

Materials Science · Physics 2016-05-25 Ashis Kumar Nandy , Nikolai S. Kiselev , Stefan Blügel