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Title: Training effects and the microscopic magnetic structure of exchange biased Co/CoO bilayers.

Abstract

Exchange bias of a partially oxidized thin film of ferromagnetic Co was studied by magnetization measurements and polarized neutron reflectivity (PNR). The magnetization curve shows strong effects of training with cycling of the magnetic field. Reflectivity measurements with the field parallel to the cooling field showed the onset of spin-dependent diffuse scattering--off the specular reflection--after a training cycle. Such scattering, of the Yoneda type, is due to misaligned Co domains possibly close to the Co/CoO interface. Subjecting the field cooled Co/CoO pair to a field perpendicular to the cooling field causes a rotation of the magnetization. PNR measurements confirmed earlier susceptibility studies by indicating that the rotation of the magnetization is reversible in fields up to 400 Oe. The rotation of the magnetization of Co is uniform across the film thickness.

Authors:
; ; ; ;
Publication Date:
Research Org.:
Argonne National Lab., IL (US)
Sponsoring Org.:
US Department of Energy (US)
OSTI Identifier:
11848
Report Number(s):
ANL/IPNS/CP-99222
TRN: AH200118%%239
DOE Contract Number:  
W-31109-ENG-38
Resource Type:
Conference
Resource Relation:
Conference: 44th Annual Conference on Magnetism and Magnetic Materials, San Jose, CA (US), 11/15/1999--11/18/1999; Other Information: PBD: 1 Sep 1999
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; COBALT; COBALT OXIDES; MAGNETIC MATERIALS; NEUTRON DIFFRACTION; MAGNETIZATION; THIN FILMS; MAGNETIC SUSCEPTIBILITY; ROTATION

Citation Formats

Berger, A., Dahlberg, E. D., Felcher, G. P., Hill, B. K., and te Velthius, S. G. E. Training effects and the microscopic magnetic structure of exchange biased Co/CoO bilayers.. United States: N. p., 1999. Web.
Berger, A., Dahlberg, E. D., Felcher, G. P., Hill, B. K., & te Velthius, S. G. E. Training effects and the microscopic magnetic structure of exchange biased Co/CoO bilayers.. United States.
Berger, A., Dahlberg, E. D., Felcher, G. P., Hill, B. K., and te Velthius, S. G. E. Wed . "Training effects and the microscopic magnetic structure of exchange biased Co/CoO bilayers.". United States. https://www.osti.gov/servlets/purl/11848.
@article{osti_11848,
title = {Training effects and the microscopic magnetic structure of exchange biased Co/CoO bilayers.},
author = {Berger, A. and Dahlberg, E. D. and Felcher, G. P. and Hill, B. K. and te Velthius, S. G. E.},
abstractNote = {Exchange bias of a partially oxidized thin film of ferromagnetic Co was studied by magnetization measurements and polarized neutron reflectivity (PNR). The magnetization curve shows strong effects of training with cycling of the magnetic field. Reflectivity measurements with the field parallel to the cooling field showed the onset of spin-dependent diffuse scattering--off the specular reflection--after a training cycle. Such scattering, of the Yoneda type, is due to misaligned Co domains possibly close to the Co/CoO interface. Subjecting the field cooled Co/CoO pair to a field perpendicular to the cooling field causes a rotation of the magnetization. PNR measurements confirmed earlier susceptibility studies by indicating that the rotation of the magnetization is reversible in fields up to 400 Oe. The rotation of the magnetization of Co is uniform across the film thickness.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1999},
month = {9}
}

Conference:
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