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Title: Exchange-spring behavior in epitaxial hard/soft magnetic bilayer films.

Abstract

We present results on the magnetic reversal process in epitaxial Sm-Co (1{bar 1}00)/TM (TM = Fe, Co) bilayer films prepared via magnetron sputtering onto Cr-buffered single-crystal MgO substrates. The magnetically hard Sm-Co films have 20-T uniaxial anisotropy and coercivities >3 T at room temperature. The magnetization of the soft layer is pinned at the interface to the hard-magnet layer and switches reversibly as expected for an exchange-spring magnet. With increasing soft layer thickness, the coercive field of the hard layer becomes significantly less than that of a single layer. We also present numerical solutions of a one-dimensional model that provide the spin configuration for each atomic layer. Comparison of the experimental results with the model simulations indicates that the exchange-spring behavior of our bilayer films can be understood from the intrinsic parameters of the hard and soft layers.

Authors:
; ; ; ;
Publication Date:
Research Org.:
Argonne National Lab., IL (US)
Sponsoring Org.:
US Department of Energy (US)
OSTI Identifier:
8897
Report Number(s):
ANL/MSD/CP-94997
TRN: AH200117%%201
DOE Contract Number:  
W-31-109-ENG-38
Resource Type:
Conference
Resource Relation:
Conference: 43rd Annual Conference on Magnetism and Magnetic Materials, San Francisco, CA (US), 01/06/1998--01/09/1998; Other Information: PBD: 5 Dec 1997
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ANISOTROPY; MAGNETIC MATERIALS; MAGNETIZATION; NUMERICAL SOLUTION; SPIN; SPUTTERING; SAMARIUM; IRON; COBALT; MAGNESIUM OXIDES; MATHEMATICAL MODELS

Citation Formats

Bader, S D, Fullerton, E E, Grimsditch, M, Jiang, J S, and Sowers, C H. Exchange-spring behavior in epitaxial hard/soft magnetic bilayer films.. United States: N. p., 1997. Web.
Bader, S D, Fullerton, E E, Grimsditch, M, Jiang, J S, & Sowers, C H. Exchange-spring behavior in epitaxial hard/soft magnetic bilayer films.. United States.
Bader, S D, Fullerton, E E, Grimsditch, M, Jiang, J S, and Sowers, C H. 1997. "Exchange-spring behavior in epitaxial hard/soft magnetic bilayer films.". United States. https://www.osti.gov/servlets/purl/8897.
@article{osti_8897,
title = {Exchange-spring behavior in epitaxial hard/soft magnetic bilayer films.},
author = {Bader, S D and Fullerton, E E and Grimsditch, M and Jiang, J S and Sowers, C H},
abstractNote = {We present results on the magnetic reversal process in epitaxial Sm-Co (1{bar 1}00)/TM (TM = Fe, Co) bilayer films prepared via magnetron sputtering onto Cr-buffered single-crystal MgO substrates. The magnetically hard Sm-Co films have 20-T uniaxial anisotropy and coercivities >3 T at room temperature. The magnetization of the soft layer is pinned at the interface to the hard-magnet layer and switches reversibly as expected for an exchange-spring magnet. With increasing soft layer thickness, the coercive field of the hard layer becomes significantly less than that of a single layer. We also present numerical solutions of a one-dimensional model that provide the spin configuration for each atomic layer. Comparison of the experimental results with the model simulations indicates that the exchange-spring behavior of our bilayer films can be understood from the intrinsic parameters of the hard and soft layers.},
doi = {},
url = {https://www.osti.gov/biblio/8897}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Fri Dec 05 00:00:00 EST 1997},
month = {Fri Dec 05 00:00:00 EST 1997}
}

Conference:
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