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A theoretical study is made of the magnetization versus applied field curves of ferromagnetic/nonmagnetic multilayers constructed according to a Fibonacci quasiperiodic sequence. The ferromagnetic films are assumed to have uniaxial…

Materials Science · Physics 2009-11-07 C. G. Bezerra , M. G. Cottam

This work explores the static and dynamic magnetic properties of weakly antiferromagnetically coupled Fe/Ti superlattices, emphasizing the link between magnetic behavior and structural characteristics. HRTEM and XRD analyses confirm…

We report local probe investigations of the magnetic interaction between BiFeO3 films and a ferromagnetic Co0.9Fe0.1 layer. Within the constraints of intralayer exchange coupling in the Co0.9Fe0.1, the multiferroic imprint in the…

Materials Science · Physics 2013-05-01 M. Trassin , J. D. Clarkson , S. R. Bowden , Jian Liu , J. T. Heron , R. J. Paull , E. Arenholz , D. T. Pierce , J. Unguris

We consider mechanism of exchange coupling based on interaction between electrons in nonmagnetic layer. Depending on ratio of inverse time of diffusion of electrons between ferromagnetic layers and ferromagnetic splitting of conducting…

Mesoscale and Nanoscale Physics · Physics 2009-09-29 Zyuzin A. Yu

We study numerically the magnetic properties (magnetization and magnetoresistance) of ultra-thin magnetic films (Fe/Cr) grown following the Fibonacci sequence. We use a phenomenological model which includes Zeeman, cubic anisotropy,…

Strongly Correlated Electrons · Physics 2009-10-31 C. G. Bezerra , J. M. de Araujo , C. Chesman , E. L. Albuquerque

The present paper theoretically investigates magnetoresistance curves in quasiperiodic magnetic multilayers for two different growth directions, namely [110] and [100]. We considered identical ferromagnetic layers separated by non-magnetic…

Mesoscale and Nanoscale Physics · Physics 2015-06-04 L. D. Machado , C. G. Bezerra , M. A. Correa , C. Chesman , J. E. Pearson , A. Hoffmann

A microscopic model is employed to calculate the spectrum of spin waves in quasiperiodic magnetic multilayers in the dipole-exchange regime. Results are presented for structures in which thin ferromagnetic films are separated by…

Mesoscale and Nanoscale Physics · Physics 2009-11-11 J. Milton Pereira , R. N. Costa Filho

Exhibiting antiferromagnetic interlayer coupling in dilute magnetic semiconductor multilayers is essential for the realisation of magnetoresistances analogous to giant magnetoresistance in metallic multilayer structures. In this work we use…

Materials Science · Physics 2008-09-03 A. D. Giddings , T. Jungwirth , B. L. Gallagher

We study coupling between the ferroelectric polarization and magnetization of granular ferromagnetic film using a phenomenological model of combined multiferroic system consisting of granular ferromagnetic film placed above the…

Mesoscale and Nanoscale Physics · Physics 2014-10-27 O. G. Udalov , N. M. Chtchelkatchev , I. S. Beloborodov

The superexchange theory predicts dominant antiferromagnetic kinetic interaction when the orbitals accommodating magnetic electrons are covalently bonded through diamagnetic bridging atoms/groups. Here we show that explicit consideration of…

Strongly Correlated Electrons · Physics 2020-09-23 Zhishuo Huang , Dan Liu , Akseli Mansikkamäki , Veacheslav Vieru , Naoya Iwahara , Liviu F. Chibotaru

The thermodynamics of a spin-1/2 magnetic multilayer system with antiferromagnetic interplanar couplings is studied using the Pair Approximation method. The special attention is paid to magnetocaloric properties, quantified by isothermal…

Materials Science · Physics 2014-09-09 Karol Szałowski , Tadeusz Balcerzak

The exchange coupling underlies ferroic magnetic coupling and is thus the key element that governs statics and dynamics of magnetic systems. This fundamental interaction comes in two flavors - symmetric and antisymmetric coupling. While…

We report a study of interlayer exchange interaction in multilayer CoPt/Co structures consisting of periodic CoPt multilayer film with an "easy axis" anisotropy and thick Co layer with an "easy plane" anisotropy separated by Pt spacer with…

Mesoscale and Nanoscale Physics · Physics 2016-11-23 E. S. Demidov , N. S. Gusev , L. I. Budarin , E. A. Karashtin , V. L. Mironov , A. A. Fraerman

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

Multilayer "ferromagnet-layered antiferromagnet" (Fe/Cr) structures frustrated due to the roughness of layer interfaces are studied by numerical modeling methods. The "thickness-roughness" phase diagrams for the case of thin ferromagnetic…

Materials Science · Physics 2016-08-31 V. D. Levchenko , A. I. Morosov , A. S. Sigov

This paper presents a review of the phenomenon of interlayer exchange coupling in magnetic multilayers. The emphasis is put on a pedagogical presentation of the mechanism of the phenomenon, which has been successfully explained in terms of…

Mesoscale and Nanoscale Physics · Physics 2009-10-31 Patrick Bruno

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 have combined neutron scattering and piezoresponse force microscopy to study the relation between the exchange bias observed in CoFeB/BiFeO3 heterostructures and the multiferroic domain structure of the BiFeO3 films. We show that the…

Materials Science · Physics 2009-11-13 H. Bea , M. Bibes , F. Ott , B. Dupe , X. -H. Zhu , S. Petit , S. Fusil , C. Deranlot , K. Bouzehouane , A. Barthelemy

An unexplored physical mechanism which produces a magnetoelectric effect in ferroelectric/ferromagnetic multilayers is studied based on first-principles calculations. Its origin is a change in bonding at the ferroelectric/ferromagnet…

Materials Science · Physics 2015-06-25 Chun-Gang Duan , Sitaram S. Jaswal , Evgeny Y. Tsymbal

Magnetoelectric coupling in ferromagnet/multiferroic systems is often manifested in the exchange bias effect, which may have combined contributions from multiple sources, such as domain walls, chemical defects or strain. In this study we…

Materials Science · Physics 2016-08-29 Qintong Zhang , Peyton Murray , Lu You , Caihua Wan , Xuan Zhang , Wenjing Li , Usman Khan , Junling Wang , Kai Liu , Xiufeng Han
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