First-principles calculations are performed to investigate the structures, electrical, and magnetic properties of compressive BiFeO3 films under electric-field and pressure perpendicular to the films. A reversible electric-field-induced strain up 10% is achieved in the compressive BiFeO3 films. The giant strain originates from rhombohedral-tetragonal (R-T) phase transition under electric-filed,...

Soft, high moment materials are crucial for the magnetic data recording industry in applications such as write poles and soft underlayers. Ever increasing areal densities have pushed the requirements for materials exhibiting saturation magnetizations above 2 T. In this work we investigate nanocrystalline FeCoB which exhibits a saturation magnetization of ;2.2 T. FeCoB exhibits a magnetostrictio...

We study the dynamics of magnetization coupled to a thermal bath of elastic modes using a system plus reservoir approach with realistic magnetoelastic coupling. After integrating out the elastic modes we obtain a self-contained equation for the dynamics of the magnetization. We find explicit expressions for the memory friction kernel and hence, via the fluctuation-dissipation theorem, for the s...

J.-F. Robillard, O. Bou Matar, J. O. Vasseur, P. A. Deymier, M. Stippinger, A.-C. Hladky-Hennion, Y. Pennec, and B. Djafari-Rouhani Joint European Laboratory LEMAC, Ecole Centrale de Lille, 59651 Villeneuve d’Ascq, France Institut d’Électronique, de Microélectronique et de Nanotechnologie, UMR CNRS 8520, Cité Scientifique, 59652 Villeneuve d’Ascq Cedex, France Department of Materials Science an...

We have studied the easy-axis reorientation of Ni/Pd multilayer with varying Ar sputtering pressure. All the Ni/Pd multilayers prepared by dc-magnetron sputtering at an Ar sputtering pressure of 2 mTorr show in-plane magnetic anisotropy. However, room-temperature perpendicular magnetic anisotropy was observed in Ni/Pd multilayers prepared at an Ar sputtering pressure of 7 mTorr. To understand t...

Despite several decades of active experimental and theoretical studies rare-earth orthoferrites, the mechanism formation their specific magnetic, magnetoelastic, optical, magneto-optical properties remains a subject discussion. This paper provides an overview simple model approaches to quantitatively describing structure–property relationships—in particular, interplay between FeO6 octahedral de...

We study the interaction of Rayleigh and shear horizontal surface acoustic waves (SAWs) with spin in thin $\mathrm{Ni}$ films on a piezoelectric ${\mathrm{Li}\mathrm{Ta}\mathrm{O}}_{3}$ substrate, which supports both SAW modes simultaneously. Because induce different strain components films, symmetries magnetoelastic driving fields, response, transmission nonreciprocity differ for modes. Our ex...

Simulations of magnetic and magnetoelastic behavior based on xnicromagnetic theory exhibit hysteresis. These magnetic systems have a highly nonlinear character involving short and long range fields. Computational results are presented and the role of various energetic contributions assessed and predicted using methods of contemporary nonlinear analysis.

We analytically investigate the Fano-type optical response and four-wave mixing (FWM) process by exploiting magnetoelasticity of a ferromagnetic material. The deformation material plays role mechanical displacement, which is simultaneously coupled to both magnon modes. report that magnetostrictively induced displacement demonstrates Fano profiles, in output field, well-tuned adjusting system pa...