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Title: Biquadratic coupling effect on magnetoresistance response curves of spin valves with a synthetic antiferromagnet

Abstract

Both normal and inverse magnetoresistance (MR) response curves were observed for synthetic spin valves with the structure of Si(100)/Ru/Co(t{sub 1})/Ru(0.7nm)/Co(t{sub 2})/Cu(3nm)/Co(t{sub 3})/Ru. Under the assumption of a coherent rotation of the magnetization in the three Co layers, the hysteresis loops, magnetization response, and MR response curves were calculated as a function of the parameters of the system. The parameters include antiferromagnetic coupling of Co(t{sub 1}) and Co(t{sub 2}) through Ru layer, a weak ferromagnetic coupling of Co(t{sub 2}) and Co(t{sub 3}) through Cu spacer, giant magnetoresistance of the Co/Cu/Co and Co/Ru/Co systems, and AMR contribution of each Co layer. The uniaxial anisotropy of each Co layer and a distribution of the coupling strength of Co(t{sub 1})/Ru/Co(t{sub 2}) were also included. To fit the experimental data well, it was necessary to include a biquadratic coupling in the Co(t{sub 1})/Ru/Co(t{sub 2}) trilayer. {copyright} 2001 American Institute of Physics.

Authors:
; ; ; ;
Publication Date:
Sponsoring Org.:
(US)
OSTI Identifier:
40203881
Resource Type:
Journal Article
Journal Name:
Journal of Applied Physics
Additional Journal Information:
Journal Volume: 89; Journal Issue: 11; Other Information: DOI: 10.1063/1.1360679; Othernumber: JAPIAU000089000011006814000001; 442111MMM; PBD: 1 Jun 2001; Journal ID: ISSN 0021-8979
Publisher:
The American Physical Society
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ANISOTROPY; DISTRIBUTION; HYSTERESIS; MAGNETIZATION; MAGNETORESISTANCE; PHYSICS; ROTATION; SPIN; VALVES

Citation Formats

Zhang, K, Kai, T, Zhao, T, Fujiwara, H, and Mankey, G J. Biquadratic coupling effect on magnetoresistance response curves of spin valves with a synthetic antiferromagnet. United States: N. p., 2001. Web. doi:10.1063/1.1360679.
Zhang, K, Kai, T, Zhao, T, Fujiwara, H, & Mankey, G J. Biquadratic coupling effect on magnetoresistance response curves of spin valves with a synthetic antiferromagnet. United States. doi:10.1063/1.1360679.
Zhang, K, Kai, T, Zhao, T, Fujiwara, H, and Mankey, G J. Fri . "Biquadratic coupling effect on magnetoresistance response curves of spin valves with a synthetic antiferromagnet". United States. doi:10.1063/1.1360679.
@article{osti_40203881,
title = {Biquadratic coupling effect on magnetoresistance response curves of spin valves with a synthetic antiferromagnet},
author = {Zhang, K and Kai, T and Zhao, T and Fujiwara, H and Mankey, G J},
abstractNote = {Both normal and inverse magnetoresistance (MR) response curves were observed for synthetic spin valves with the structure of Si(100)/Ru/Co(t{sub 1})/Ru(0.7nm)/Co(t{sub 2})/Cu(3nm)/Co(t{sub 3})/Ru. Under the assumption of a coherent rotation of the magnetization in the three Co layers, the hysteresis loops, magnetization response, and MR response curves were calculated as a function of the parameters of the system. The parameters include antiferromagnetic coupling of Co(t{sub 1}) and Co(t{sub 2}) through Ru layer, a weak ferromagnetic coupling of Co(t{sub 2}) and Co(t{sub 3}) through Cu spacer, giant magnetoresistance of the Co/Cu/Co and Co/Ru/Co systems, and AMR contribution of each Co layer. The uniaxial anisotropy of each Co layer and a distribution of the coupling strength of Co(t{sub 1})/Ru/Co(t{sub 2}) were also included. To fit the experimental data well, it was necessary to include a biquadratic coupling in the Co(t{sub 1})/Ru/Co(t{sub 2}) trilayer. {copyright} 2001 American Institute of Physics.},
doi = {10.1063/1.1360679},
journal = {Journal of Applied Physics},
issn = {0021-8979},
number = 11,
volume = 89,
place = {United States},
year = {2001},
month = {6}
}