Role of film thickness and disorder in tuning perpendicular magnetic anisotropy in GdTb-FeCo alloy films

Sahoo, Ajit Kumar and Chelvane, J Arout and Mohanty, Jyoti Ranjan (2021) Role of film thickness and disorder in tuning perpendicular magnetic anisotropy in GdTb-FeCo alloy films. Physica Scripta, 96 (3). ISSN 0031-8949

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Abstract

GdTb-FeCo based quaternary system of various thicknesses (30, 50, 75, 150, and 300 nm) is explored in pursuit of tuneable perpendicular magnetic anisotropy (PMA). Spin reorientation and strong PMA is evident at higher film thickness. A variety of microscopic domains can be referred to as disorder in domains, have been observed. Gd-like and Tb-like contributing domains are observed in various films. A critical thickness is observed at 150 nm, where most of the Tb-sublattices are dominated over the Gd-sublattices. Magnetic parameters do not follow the trend at 150 nm, which could be attributed to a lesser extent of pinning sites impeded to domain wall motions. The experimental finding is complemented with 3D micromagnetic simulations. © 2021 IOP Publishing Ltd.

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IITH Creators:

IITH Creators	ORCiD
Mohanty, Jyoti Ranjan	https://orcid.org/0000-0001-9579-754X

Item Type:

Article

Additional Information:

The author would like to thank Indian Institute of Technology Hyderabad for funding the research. A. K. S and J. M acknowledge the funding from DST-SERB, Govt. of India through the project EMR/2016/006794 and NRB-DRDO through project NRB/4003/PG/430.

Uncontrolled Keywords:

Magnetic domains; Micromagnetic simulation; Microscopic imaging; Perpendicular magnetic anisotropy; Rare-earth and transitional metal alloy; Spin reorientation

Subjects:

Physics

Divisions:

Department of Physics

Depositing User:

. LibTrainee 2021

Date Deposited:

23 Sep 2022 05:14

Last Modified:

23 Sep 2022 05:14

URI:

http://raiithold.iith.ac.in/id/eprint/10666