Thickness dependences of structural and magnetic properties of Ni(Co)MnSn/MgO(001) thin films

被引：4

作者：

Golub, V ^{[1
]}

Aseguinolaza, I. R. ^{[2
]}

Salyuk, O. ^{[1
]}

Popadiuk, D. ^{[1
]}

Sharay, I ^{[1
]}

Fernandez, R. ^{[3
]}

Alexandrakis, V ^{[2
,4
]}

Bunyaev, S. A. ^{[5
]}

Kakazei, G. N. ^{[5
]}

Barandiaran, J. M. ^{[2
]}

Chernenko, V. A. ^{[2
,3
,6
]}

机构：

[1] Inst Magnetism, UA-03142 Kiev, Ukraine

[2] Univ Basque Country UPV EHU, Bilbao 48080, Spain

[3] Univ Basque Country, Basque Ctr Mat Applicat & Nanostruct, BCMat, Sci Pk, Leioa 48940, Spain

[4] NCSR Demokritos, Aghia Paraskevi 15310, Greece

[5] Univ Porto, Inst Phys Adv Mat Nanotechnol & Photon IFIMUP, Dept Fis & Astron, P-4169007 Porto, Portugal

[6] Basque Fdn Sci, Ikerbasque, Bilbao 48009, Spain

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2021年 / 862卷

基金：

新加坡国家研究基金会;

关键词：

Magnetic shape memory alloys; Twin structure; Martensitic transformation; Magnetic electron spin resonance;

D O I：

10.1016/j.jallcom.2020.158474

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The influence of film thickness on the formation of twinning structure, martensitic transformation and magnetoelastic properties of epitaxial films of Ni(Co)MnSn magnetic shape memory alloy is investigated by means of ferromagnetic resonance spectroscopy, synchrotron X-ray diffraction and standard magnetic measurements. It is found that constraints from the film/substrate interface block the martensitic transformation in the 20 nm thick film. The increase of the film thickness results in a progressive stress relaxation and, as a result, the martensitic transformation becomes possible starting from 50 nm. Twinning of the films is required to conserve the films surface area. The elastic energy balance between the film/substrate interface and the twin boundaries leads to the formation of a submicron wide, stripe like, periodical structure of twins, which is of interest for spintronic or magnonic applications. The width of the twin variants increases with the film thickness growth, resulting in the dramatic modification of magnetic properties. (C) 2020 Elsevier B.V. All rights reserved.

引用

页数：7

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