Understanding thickness dependent magnetic properties of Tb-Fe thin films

Basumatary, Himalay and Chelvane, J. Arout and Rao, D.V. Sridhara and Talapatra, A. and Mohanty, J. and Kumar, Deepak and Singh, Vajinder and Kamat, S.V. and Ranjan, Rajeev (2021) Understanding thickness dependent magnetic properties of Tb-Fe thin films. Journal of Alloys and Compounds, 869. p. 159571. ISSN 09258388

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Abstract

In this paper, we have attempted to understand the magnetic behaviour of Tb-Fe thin films grown with different thicknesses through detailed electron microscopy, magnetization measurements and magnetic domain imaging studies. Tb-Fe thin films over a range of thicknesses such as 50, 100, 200, 400, 600 and 800 nm were deposited on Si<100>substrates using electron beam evaporation technique. Grazing incidence X-ray diffraction studies revealed that all the films were amorphous in nature. Microstructural studies using transmission electron microscopy showed columnar channel of voids extending from substrate to film surface. Magnetization measurements along the in-plane and out-of-plane direction indicated presence of out-of-plane magnetic anisotropy in all the films. Saturation magnetization and coercivity measured along the out-of-plane direction were found to vary with the thickness of the films. A very high coercivity of ~2000 mT was obtained for the film having thickness of 400 nm. Magnetic anisotropy calculations indicated a strong perpendicular magnetic anisotropy for the 400 nm thick film. The variation of magnetic anisotropy with film thickness was correlated with the magnetic domain patterns observed in the films using magnetic force microscopy.

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IITH Creators:

IITH Creators	ORCiD
Mohanty, Jyoti Ranjan	UNSPECIFIED

Item Type:

Article

Uncontrolled Keywords:

Binary alloys; Coercive force; High resolution transmission electron microscopy; Iron alloys; Magnetic domains; Saturation magnetization; Substrates; Thick films; Thin films

Subjects:

Physics

Divisions:

Department of Physics

Depositing User:

. LibTrainee 2021

Date Deposited:

29 Jul 2021 11:35

Last Modified:

29 Jul 2021 11:35

URI:

http://raiithold.iith.ac.in/id/eprint/8563