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Title: Anisotropy of the sublattice magnetization and magnetoresistance in Co/Re superlattices on Al{sub 2}O{sub 3}(11{bar 2}0)

Abstract

[Co(20;{Angstrom})/Re(6;{Angstrom})]{sub 20} superlattices were grown on a (11{bar 2}0) surface of a Al{sub 2}O{sub 3} single crystal, with the [0001] direction of their {ital hcp} structure in the plane of the film. The Co layers were found to be antiferromagnetically coupled (AF), with a saturating field of 6 kOe. Polarized neutron reflectivity was used to determine the direction of the sublattice magnetization. In zero applied field, the AF moments are aligned along the Co[0001] axis. In a magnetic field {ital H} perpendicular to the Co[0001] axis, the sublattices moments evolve to a canted arrangement, with the AF component always perpendicular to the field. With {ital H} along the Co[0001] axis, the AF moments flop in a direction perpendicular to Co[0001] axis. The spin flop transition is not abrupt, but can be described as a gradual rotation that is completed at 2 kOe. The anisotropy of the sublattice magnetization is related to the anisotropy of the magnetoresistance. This has the conventional dumbbell behavior with the field applied perpendicular to the Co[0001] axis, but exhibits an extended plateau near H=0, and a slight increase up to H{approximately};kOe, when {ital H} is parallel to Co[0001] axis. {copyright} {ital 1999 American Institute of Physics.}

Authors:
;  [1]; ;  [2]
  1. Physics Department, West Virginia University, Morgantown, West Virginia 26506-6315 (United States)
  2. Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439 (United States)
Publication Date:
OSTI Identifier:
347045
Resource Type:
Journal Article
Journal Name:
Journal of Applied Physics
Additional Journal Information:
Journal Volume: 85; Journal Issue: 8; Other Information: PBD: Apr 1999
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; MAGNETIC MOMENTS; COBALT; RHENIUM; MAGNETIZATION; MAGNETORESISTANCE; SUPERLATTICES; SPIN FLIP; ANISOTROPY; X-RAY DIFFRACTION

Citation Formats

Charlton, T, Lederman, D, Yusuf, S M, and Felcher, G P. Anisotropy of the sublattice magnetization and magnetoresistance in Co/Re superlattices on Al{sub 2}O{sub 3}(11{bar 2}0). United States: N. p., 1999. Web. doi:10.1063/1.370366.
Charlton, T, Lederman, D, Yusuf, S M, & Felcher, G P. Anisotropy of the sublattice magnetization and magnetoresistance in Co/Re superlattices on Al{sub 2}O{sub 3}(11{bar 2}0). United States. doi:10.1063/1.370366.
Charlton, T, Lederman, D, Yusuf, S M, and Felcher, G P. Thu . "Anisotropy of the sublattice magnetization and magnetoresistance in Co/Re superlattices on Al{sub 2}O{sub 3}(11{bar 2}0)". United States. doi:10.1063/1.370366.
@article{osti_347045,
title = {Anisotropy of the sublattice magnetization and magnetoresistance in Co/Re superlattices on Al{sub 2}O{sub 3}(11{bar 2}0)},
author = {Charlton, T and Lederman, D and Yusuf, S M and Felcher, G P},
abstractNote = {[Co(20;{Angstrom})/Re(6;{Angstrom})]{sub 20} superlattices were grown on a (11{bar 2}0) surface of a Al{sub 2}O{sub 3} single crystal, with the [0001] direction of their {ital hcp} structure in the plane of the film. The Co layers were found to be antiferromagnetically coupled (AF), with a saturating field of 6 kOe. Polarized neutron reflectivity was used to determine the direction of the sublattice magnetization. In zero applied field, the AF moments are aligned along the Co[0001] axis. In a magnetic field {ital H} perpendicular to the Co[0001] axis, the sublattices moments evolve to a canted arrangement, with the AF component always perpendicular to the field. With {ital H} along the Co[0001] axis, the AF moments flop in a direction perpendicular to Co[0001] axis. The spin flop transition is not abrupt, but can be described as a gradual rotation that is completed at 2 kOe. The anisotropy of the sublattice magnetization is related to the anisotropy of the magnetoresistance. This has the conventional dumbbell behavior with the field applied perpendicular to the Co[0001] axis, but exhibits an extended plateau near H=0, and a slight increase up to H{approximately};kOe, when {ital H} is parallel to Co[0001] axis. {copyright} {ital 1999 American Institute of Physics.}},
doi = {10.1063/1.370366},
journal = {Journal of Applied Physics},
number = 8,
volume = 85,
place = {United States},
year = {1999},
month = {4}
}