npsm 새물리 New Physics : Sae Mulli

pISSN 0374-4914 eISSN 2289-0041
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Article

Research Paper

New Physics: Sae Mulli 2017; 67: 1157-1161

Published online October 31, 2017 https://doi.org/10.3938/NPSM.67.1157

Copyright © New Physics: Sae Mulli.

Influence of a Non-Magnetic Capping Layer and Annealing Temperature on the Magnetic Properties of Fe Films

Yunhee CHO1, Donghyuk YANG1, Dooyong LEE1, Jiwoong KIM1, Sungkyun PARK*1, Jisung LEE1,2

1 Department of Physics, Pusan National University, Busan 46241, Korea
2 Neutron Science Center, Korea Atomic Energy Research Institute, Daejeon 34057, Korea

Correspondence to:psk@pusan.ac.kr

Received: August 16, 2017; Revised: September 18, 2017; Accepted: September 18, 2017

This is an open-access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The effects of a capping layer (Cu, Al) and post-annealing on the magnetic properties of Fe films grown on MgO(001) were investigated. As-grown films showed similar coercivities. However, the saturation magnetization was the largest for the uncapped Fe film, suggesting that the interface plays an important role in the saturation magnetization. After vacuum annealing at 500 $^\circ$C for 30 min, the coercivities of all films were increased. Moreover, the films with a capping layer showed increased saturation magnetization. However, the saturation magnetization of the uncapped Fe films was lower after annealing. The variations in the capping-material-dependent magnetic properties might be related to different effects that occur at the interface between the Fe and the capping layer.

Keywords: Capping materials, Post-annealing, Magnetic properties, Interdiffusion

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