Yadav, K. and Singh, H. K. and Maurya, K. K. and Varma, G. D. (2018) Thickness-dependent magnetic and transport properties of La0.5Sr0.5MnO3 thin films deposited by DC magnetron sputtering on the LaAlO3 substrate. Applied Physics A: Materials Science and Processing , 124 (1). pp. 66-72. ISSN 0947-8396

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Abstract

Thickness-dependent structural, magnetic and transport properties of La0.5Sr0.5MnO3(LSMO) thin films have been studied. A series of the LSMO films with thickness 30, 60, 125 and 300 nm have been deposited on the LaAlO3 substrate using DC magnetron sputtering. The paramagnetic to ferromagnetic transition at T-c is followed by antiferromagnetic ordering at T-N in all films. It is also found that all LSMO films have T-c lower than that of bulk LSMO. A small variation of T-c is observed on increasing the film thickness. However, T-N is found to rise with increase in the film thickness. The 60 nm-thick film shows a wide insulator to metal transition. The resistivity above 240 K of the films with various thicknesses is consistent with a small polaronic hopping conductivity. The polaronic formation energy E-A rises with the increase of the film thickness except for 60 nm thin film, where a small decline in E-A is observed. The correlation between observed structural, magnetic and electrical properties with the thickness of the films has been discussed in this paper.

Item Type:	Article
Additional Information:	Copyright for this article belongs to M/s Springer Verlag.
Subjects:	Materials Science Applied Physics/Condensed Matter
Divisions:	UNSPECIFIED
Depositing User:	Users 27 not found.
Date Deposited:	20 Dec 2019 07:43
Last Modified:	20 Dec 2019 07:43
URI:	http://npl.csircentral.net/id/eprint/3730

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