Manipulation of magnetic anisotropy by voltage induced strain in Co2MnAl/PMN-PT heterostructure

Journal of Applied Physics

Abstract

We have investigated the effect of an external electric field on the magnetic properties of Co2MnAl thin films deposited on a lead magnesium niobate-lead titanate (PMN-PT) (011) substrate. Stain-induced magnetoelectric coupling affects the magnetic properties of the Co2MnAl/PMN-PT system. The piezo-strain induced by applying an external field normal to the surface induces only in-plane strain, which leads to the rotation of easy-axis orientation of Co2MnAl from [100] to [011¯] direction. The remanent magnetization states and coercivity of the Co2MnAl film vary significantly and asymmetrically with the applied voltage due to anisotropic strain originating from PMN-PT. Electrical control of magnetic anisotropy in a Co2MnAl Heusler compound at room temperature will be of interest for realizing next-generation magnetoelectric random access memory devices.

Keywords

Materials science Magnetic anisotropy Condensed matter physics Anisotropy Coercivity Magnetization Ferroelectricity Substrate (aquarium) Heterojunction Remanence Thin film Magnetic field Nuclear magnetic resonance Optoelectronics Dielectric Nanotechnology Optics

Subject Areas

Multiferroics and related materials ·Electronic, Optical and Magnetic Materials ·Physical Sciences

Heusler alloys: electronic and magnetic properties ·Electronic, Optical and Magnetic Materials ·Physical Sciences

Ferroelectric and Piezoelectric Materials ·Materials Chemistry ·Physical Sciences

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Manipulation of magnetic anisotropy by voltage induced strain in Co2MnAl/PMN-PT heterostructure

Abstract

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