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Structural, microstructural and magnetic investigations on the epitaxially grown Ni2MnGa(010) films on MgO(100) substrate

Sharma, Amit and Mohan, S and Suwas, Satyam (2016) Structural, microstructural and magnetic investigations on the epitaxially grown Ni2MnGa(010) films on MgO(100) substrate. In: INTERMETALLICS, 77 . pp. 6-13.

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Official URL: http://dx.doi.org/10.1016/j.intermet.2016.06.009

Abstract

We report the epitaxial growth of Ni2MnGa thin films on MgO(100) substrate deposited at elevated temperature using direct current magnetron sputtering. The structural and texture analysis of as deposited film reveal the (010) crystallographic orientation with seven modulated martensite phase and an epitaxial relationship of Ni2MnGa(010){101} parallel to MgO(001){110} between the film and the substrate. The crystal quality of the films was analysed by performing symmetric and asymmetric rocking curve measurements and dislocation density for screw and edge dislocations is determined to be 6 x 10(9) cm(-2) and 3.45 x 10(10) cm(-2), respectively. The presence of micro-twins at an angle of 45 degrees with respect to growth direction and seven modulated nano-twins formed by adaptive modulation has been observed with transmission electron microscopy investigations. The magnetic measurements indicates magnetic field induced reorientation of martensitic variants, strong magneto-crystalline anisotropy and a very high saturation magnetization (I-s) of 61 emu g(-1) in the film. (C) 2016 Elsevier Ltd. All rights reserved.

Item Type: Journal Article
Additional Information: Copy right for this article belongs to the ELSEVIER SCI LTD, THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
Department/Centre: Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
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Depositing User: Id for Latest eprints
Date Deposited: 03 Dec 2016 05:09
Last Modified: 03 Dec 2016 05:09
URI: http://eprints.iisc.ac.in/id/eprint/55221

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