Enhancement of magnetostrictive properties of Galfenol thin films

Abstract

The present study investigates the role of substrate temperatures on the structural, morphological, magnetic and magnetostrictive properties of DC sputtered FeGa thin films grown on Si substrates. These films were deposited at various substrate temperatures between 50 and 350 °C. The structural characterization of the films revealed columnar growth and the transformation of surface morphology from prismatic to spherical at high substrate temperatures. Both L12 and B2 phases of FeGa existed in the films, with the L12 phase dominating. The in-plane and out-of-plane vibration sample magnetometry measurements showed the evolution of magnetic anisotropy in these films. It was revealed from the magnetostriction measurements that the films deposited at 250 °C exhibited the maximum value of 59 ppm.

Metadata

Item Type:	Article
Authors/Creators:	Nivedita, L.R. Manivel, P. Pandian, R. Murugesan, S. Morley, N.A. https://orcid.org/0000-0002-7284-7978 Asokan, K. (.) Rajendra Kumar, R.T.
Copyright, Publisher and Additional Information:	© 2017 Elsevier. This is an author produced version of a paper subsequently published in Journal of Magnetism and Magnetic Materials. Uploaded in accordance with the publisher's self-archiving policy. Article available under the terms of the CC-BY-NC-ND licence (https://creativecommons.org/licenses/by-nc-nd/4.0/).
Keywords:	FeGa; Magnetostriction; magnetic anisotropy; sputtering; magnetic thin films
Dates:	Published: 1 April 2018 Published (online): 16 November 2017 Accepted: 6 November 2017
Institution:	The University of Sheffield
Academic Units:	The University of Sheffield > Faculty of Engineering (Sheffield) > Department of Materials Science and Engineering (Sheffield)
Depositing User:	Symplectic Sheffield
Date Deposited:	10 Nov 2017 12:10
Last Modified:	16 Nov 2018 01:38
Published Version:	https://doi.org/10.1016/j.jmmm.2017.11.030
Status:	Published
Publisher:	Elsevier
Refereed:	Yes
Identification Number:	10.1016/j.jmmm.2017.11.030
Open Archives Initiative ID (OAI ID):	oai:eprints.whiterose.ac.uk:123602

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Enhancement of magnetostrictive properties of Galfenol thin films

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