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}
}