Synthesis, magnetic properties, and modelling of remagnetization of an artificial antiferromagnet based on L10-PdFe

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Abstract

We presented the results of experimental studies of static magnetic properties and modeling of magnetization reversal in an epitaxial thin film of the L10-phase of the PdFe compound and the PdFe/W/PdFe heterostructure on MgO (001) substrates. It is shown that the PdFe/W/PdFe heteroepitaxial structure with the α-W layer thickness of ~ 0.7 nm represents an artificial antiferromagnet with perpendicular magnetic anisotropy and an exchange integral value of J≃1.7⋅10−3Дж/м2. Micromagnetic modeling of the equilibrium domain structure and its evolution in an external magnetic field made it possible to satisfactorily describe the magnetization reversal curve of the studied thin-film heterostructure.

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About the authors

M. V. Pasynkov

Kazan Federal University

Author for correspondence.
Email: mike_p95@mail.ru

Institute of Physics

Russian Federation, Kazan

I. V. Yanilkin

Kazan Federal University

Email: mike_p95@mail.ru

Institute of Physics

Russian Federation, Kazan

A. I. Gumarov

Kazan Federal University

Email: mike_p95@mail.ru

Institute of Physics

Russian Federation, Kazan

A. V. Petrov

Kazan Federal University

Email: mike_p95@mail.ru

Institute of Physics

Russian Federation, Kazan

L. R. Tagirov

Kazan Federal University; Federal Research Сenter Kаzаn Sсientifiс Сenter оf the Russian Аcademy of Sciences

Email: mike_p95@mail.ru

Institute of Physics, Zаvоisky Physiсаl-Teсhniсаl Institute

Russian Federation, Kazan; Kazan

R. V. Yusupov

Kazan Federal University

Email: mike_p95@mail.ru

Institute of Physics

Russian Federation, Kazan

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2. Fig. 1. Magnetization reversal curve of a single thin epitaxial film of the L10 phase of the PdFe compound in a field applied normally to the plane of the sample.

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3. Fig. 2. Magnetization reversal curve of the thin-film epitaxial heterostructure PdFe/W/PdFe in a field applied along the normal (red symbols) and the result of its micromagnetic modeling (black curve).

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4. Fig. 3. Magnetization curves of a single thin PdFe film (shown in red) and a heteroepitaxial PdFe/W/PdFe structure (green curve), measured in a field lying in the plane of the samples.

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5. Fig. 4. Equilibrium domain structure of the thin-film heteroepitaxial FePd/W/FePd structure in zero magnetic field (a) and its evolution in an applied magnetic field (b). Two columns of panel (b) illustrate the distribution of the normal component of magnetization in the middle (throughout the thickness) of each of the two magnetic layers; black and white colors correspond to the directions of magnetization downward and upward along the normal to the plane of the sample, respectively.

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