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Title: Tailoring the magnetization reversal of elliptical dots using exchange bias.

Abstract

Exchange bias effects have been studied in elliptical dots composed of ferromagnetic Ni{sub 80}Fe{sub 20}-antiferromagnetic Ir{sub 20}Mn{sub 80} bilayers. The magnetization reversal mechanisms and magnetic configurations have been investigated by magneto-optic Kerr effect and magnetic force microscopy. Although the obtained bias fields in these dots are relatively small, the magnetization reversal is found to be influenced by the ferromagnetic-antiferromagnetic coupling. Namely, for some off-axis angles of measurement, the magnetization reversal mechanism of the Ni{sub 80}Fe{sub 20}-Ir{sub 20}Mn{sub 80} ellipses depends on whether exchange bias is induced along the minor or major axis of the ellipses. Hence, exchange bias is shown to be an effective means for tailoring the magnetization reversal of elliptical dots after sample fabrication.

Authors:
; ; ; ; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC); ESF
OSTI Identifier:
975435
Report Number(s):
ANL/CNM/JA-61100
Journal ID: ISSN 0021-8979; JAPIAU; TRN: US201008%%275
DOE Contract Number:  
DE-AC02-06CH11357
Resource Type:
Journal Article
Journal Name:
J. Appl. Phys.
Additional Journal Information:
Journal Volume: 103; Journal Issue: 2008; Journal ID: ISSN 0021-8979
Country of Publication:
United States
Language:
ENGLISH
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ATOMIC FORCE MICROSCOPY; FABRICATION; KERR EFFECT; MAGNETIC FIELDS; MAGNETIZATION

Citation Formats

Sort, J, Buchanan, K S, Pearson, J E, Hoffmann, A, Menendez, E, Salazar-Alvarez, G, Baro, M D, Miron, M, Rodamcq, B, Dieny, B, ICREA,, Univ. Autonoma of Barcelona, de Nanotecnologia, Insti Catala, and SPINTEC,. Tailoring the magnetization reversal of elliptical dots using exchange bias.. United States: N. p., 2008. Web. doi:10.1063/1.2840467.
Sort, J, Buchanan, K S, Pearson, J E, Hoffmann, A, Menendez, E, Salazar-Alvarez, G, Baro, M D, Miron, M, Rodamcq, B, Dieny, B, ICREA,, Univ. Autonoma of Barcelona, de Nanotecnologia, Insti Catala, & SPINTEC,. Tailoring the magnetization reversal of elliptical dots using exchange bias.. United States. https://doi.org/10.1063/1.2840467
Sort, J, Buchanan, K S, Pearson, J E, Hoffmann, A, Menendez, E, Salazar-Alvarez, G, Baro, M D, Miron, M, Rodamcq, B, Dieny, B, ICREA,, Univ. Autonoma of Barcelona, de Nanotecnologia, Insti Catala, and SPINTEC,. 2008. "Tailoring the magnetization reversal of elliptical dots using exchange bias.". United States. https://doi.org/10.1063/1.2840467.
@article{osti_975435,
title = {Tailoring the magnetization reversal of elliptical dots using exchange bias.},
author = {Sort, J and Buchanan, K S and Pearson, J E and Hoffmann, A and Menendez, E and Salazar-Alvarez, G and Baro, M D and Miron, M and Rodamcq, B and Dieny, B and ICREA, and Univ. Autonoma of Barcelona and de Nanotecnologia, Insti Catala and SPINTEC,},
abstractNote = {Exchange bias effects have been studied in elliptical dots composed of ferromagnetic Ni{sub 80}Fe{sub 20}-antiferromagnetic Ir{sub 20}Mn{sub 80} bilayers. The magnetization reversal mechanisms and magnetic configurations have been investigated by magneto-optic Kerr effect and magnetic force microscopy. Although the obtained bias fields in these dots are relatively small, the magnetization reversal is found to be influenced by the ferromagnetic-antiferromagnetic coupling. Namely, for some off-axis angles of measurement, the magnetization reversal mechanism of the Ni{sub 80}Fe{sub 20}-Ir{sub 20}Mn{sub 80} ellipses depends on whether exchange bias is induced along the minor or major axis of the ellipses. Hence, exchange bias is shown to be an effective means for tailoring the magnetization reversal of elliptical dots after sample fabrication.},
doi = {10.1063/1.2840467},
url = {https://www.osti.gov/biblio/975435}, journal = {J. Appl. Phys.},
issn = {0021-8979},
number = 2008,
volume = 103,
place = {United States},
year = {Tue Jan 01 00:00:00 EST 2008},
month = {Tue Jan 01 00:00:00 EST 2008}
}