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journal article·2023-12-01Open access

Giant four-fold magnetic anisotropy in nanotwinned NiMnGa epitaxial films

Pavlo V. Bondarenko, Julia Kharlan, Sergey A. Bunyaev, Olga Salyuk, Ivan R. Aseguinolaza, Jose M. Barandiaran, Gleb N. Kakazei, Volodymyr Chernenko, Vladimir O. Golub

APL Materials· Volume 11· Issue 12
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Source abstract

Abstract

A giant four-fold magnetic anisotropy (with an anisotropy field up to 4 kOe) was observed in the twinned NiMnGa epitaxial film. Its appearance is explained in terms of moderate coupling between twin variants having strong uniaxial magnetocrystalline anisotropies directed orthogonally when the intertwin exchange field is comparable with the anisotropy field. This finding paves the way to increase the order of magnetic anisotropy in a many-component system while keeping the value of the anisotropy field by tuning the intercomponent exchange strength and can be extended to exchange-coupled multilayers and arrays of nanoelements.
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Research context

Nanomaterials

OpenAlex topics: Shape Memory Alloy Transformations · Magnetic and transport properties of perovskites and related materials · Magnetic properties of thin films

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Institute of Magnetism NAS of Ukraine and MES of Ukraine 1 , 36-B Vernadsky Blvd., 03142 Kyiv, Ukraine

Faculty of Physics, Adam Mickiewicz University in Poznan 3 , Umultowska 85, 61–614 Poznan, Poland

Institute of Physics for Advanced Materials, Nanotechnology and Photonics (IFIMUP)/Department of Physics and Astronomy, Faculty of Sciences, University of Porto 4 , 4169-007 Porto, Portugal

National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute 2 ,” 37 Peremohy Ave., 03056 Kyiv, Ukraine

University of the Basque Country (UPV/EHU) 5 , Bilbao 48080, Spain

Basque Center for Materials, Applications and Nanostructure, BCMaterials 6 , Leioa 48940, Spain

Ikerbasque, Basque Foundation for Science 7 , Bilbao 48009, Spain

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