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

• Type: Article in International Scientific Journal
• Date: 2021

Authors

Golub, V (Author) Other; Aseguinolaza, IR (Author) Other; Salyuk, O (Author) Other; Popadiuk, D (Author) Other; Sharay, I (Author) Other; Fernandez, R (Author) Other; Alexandrakis, V (Author) Other; Bunyaev, SA (Author) FCUP; G.N. Kakazei (Author) FCUP; Barandiaran, JM (Author) Other; Chernenko, VA (Author) Other

Journal

Title: Journal of Alloys and Compounds

Vol. 862

ISSN: 0925-8388

Publisher: Elsevier

Indexing

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Other information

Authenticus ID: P-00T-CEF

DOI: 10.1016/j.jallcom.2020.158474

Abstract (EN): 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.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 7