skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Studying the reversal mode of the magnetization vector versus applied field angle using generalized magneto-optical ellipsometry

Abstract

We used the technique of vector generalized magneto-optical ellipsometry to study the behavior of the magnetization vector of a 50 nm Co thin film as a function of external field magnitude and direction. We determined the relative contributions of magnetization rotation and domain formation to the reversal of M. The Co sample had a uniaxial in-plane anisotropy. When the angle between the applied field and the easy axis was greater than {approx}40 degree sign , the reversal occurred primarily by rotation of the magnetization, accompanied by a small reduction of the magnitude of M. In this angular region, the field at which there is a large jump in the angle of M as a function of applied field angle followed a single domain coherent rotation model. However, at applied field angles less than 40 degree sign to the easy axis, a larger reduction in |M| occurred during the jump in the magnetization angle. The jump also occurred at fields much lower than those predicted by the coherent rotation model, indicating a reversal mode initiated by domain formation. (c) 2000 American Institute of Physics.

Authors:
 [1];  [2]
  1. Department of Physics and Center for Magnetic Recording Research, University of California, San Diego, 9500 Gilman Drive La Jolla, California 92093 (United States)
  2. Argonne National Laboratory, Argonne, Illinois 60439 (United States)
Publication Date:
OSTI Identifier:
20216254
Resource Type:
Journal Article
Journal Name:
Journal of Applied Physics
Additional Journal Information:
Journal Volume: 87; Journal Issue: 9; Other Information: PBD: 1 May 2000; Journal ID: ISSN 0021-8979
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; MAGNETIZATION; ELLIPSOMETRY; MAGNETO-OPTICAL EFFECTS; COBALT; THIN FILMS; DOMAIN STRUCTURE; EXPERIMENTAL DATA

Citation Formats

Pufall, M. R., and Berger, A. Studying the reversal mode of the magnetization vector versus applied field angle using generalized magneto-optical ellipsometry. United States: N. p., 2000. Web. doi:10.1063/1.372538.
Pufall, M. R., & Berger, A. Studying the reversal mode of the magnetization vector versus applied field angle using generalized magneto-optical ellipsometry. United States. doi:10.1063/1.372538.
Pufall, M. R., and Berger, A. Mon . "Studying the reversal mode of the magnetization vector versus applied field angle using generalized magneto-optical ellipsometry". United States. doi:10.1063/1.372538.
@article{osti_20216254,
title = {Studying the reversal mode of the magnetization vector versus applied field angle using generalized magneto-optical ellipsometry},
author = {Pufall, M. R. and Berger, A.},
abstractNote = {We used the technique of vector generalized magneto-optical ellipsometry to study the behavior of the magnetization vector of a 50 nm Co thin film as a function of external field magnitude and direction. We determined the relative contributions of magnetization rotation and domain formation to the reversal of M. The Co sample had a uniaxial in-plane anisotropy. When the angle between the applied field and the easy axis was greater than {approx}40 degree sign , the reversal occurred primarily by rotation of the magnetization, accompanied by a small reduction of the magnitude of M. In this angular region, the field at which there is a large jump in the angle of M as a function of applied field angle followed a single domain coherent rotation model. However, at applied field angles less than 40 degree sign to the easy axis, a larger reduction in |M| occurred during the jump in the magnetization angle. The jump also occurred at fields much lower than those predicted by the coherent rotation model, indicating a reversal mode initiated by domain formation. (c) 2000 American Institute of Physics.},
doi = {10.1063/1.372538},
journal = {Journal of Applied Physics},
issn = {0021-8979},
number = 9,
volume = 87,
place = {United States},
year = {2000},
month = {5}
}