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Title: Magnetic instability regions in patterned structures : influence of element shape on magnetization reversal dynamics.

Abstract

We report a time-resolved imaging study of the influence of shape on magnetic instabilities in patterned magnetic structures. We find that in rectangular structures magnetization reversal initiates at the ends and interior simultaneously, while in structures with tapered ends the reversal begins in the middle of the structures and spreads out to the ends. The degree of tapering is important for both the switching field and the time required for full reversal. A model based on the concept of local instability regions yields good agreement with the observed location of the reversal onsets.

Authors:
; ; ; ; ; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Laboratory Directed Research and Development (LDRD) Program; USDOE Office of Science (SC)
OSTI Identifier:
982022
Report Number(s):
ANL/XSD/CP-57171
Journal ID: 0031-9007; TRN: US201013%%874
DOE Contract Number:  
DE-AC02-06CH11357
Resource Type:
Conference
Resource Relation:
Journal Name: Phys. Rev. Lett.; Journal Volume: 98; Journal Issue: Apr. 6, 2007; Conference: 10th Joint MMM/Intermag Conference; Jan. 7, 2007 - Jan. 11, 2007; Baltimore, MD
Country of Publication:
United States
Language:
ENGLISH
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; DYNAMICS; ELEMENTS; INSTABILITY; JOINTS; MAGNETIZATION; MEETINGS; SHAPE; YIELDS

Citation Formats

Keavney, D. J., Han, X. F., Grimsditch, M., Meersschaut, J., Hoffmann, A., Ji, Y., Sort, J., Notues, J., Divan, R., Pearson, J. E., Guslienko, K. Y., Bader, S. D., Inst. voor Kern-en Stralingsfysica and INPAC, and Univ. Autonoma de Barcelona. Magnetic instability regions in patterned structures : influence of element shape on magnetization reversal dynamics.. United States: N. p., 2007. Web. doi:10.1103/PhysRevLett.98.147202.
Keavney, D. J., Han, X. F., Grimsditch, M., Meersschaut, J., Hoffmann, A., Ji, Y., Sort, J., Notues, J., Divan, R., Pearson, J. E., Guslienko, K. Y., Bader, S. D., Inst. voor Kern-en Stralingsfysica and INPAC, & Univ. Autonoma de Barcelona. Magnetic instability regions in patterned structures : influence of element shape on magnetization reversal dynamics.. United States. doi:10.1103/PhysRevLett.98.147202.
Keavney, D. J., Han, X. F., Grimsditch, M., Meersschaut, J., Hoffmann, A., Ji, Y., Sort, J., Notues, J., Divan, R., Pearson, J. E., Guslienko, K. Y., Bader, S. D., Inst. voor Kern-en Stralingsfysica and INPAC, and Univ. Autonoma de Barcelona. Fri . "Magnetic instability regions in patterned structures : influence of element shape on magnetization reversal dynamics.". United States. doi:10.1103/PhysRevLett.98.147202.
@article{osti_982022,
title = {Magnetic instability regions in patterned structures : influence of element shape on magnetization reversal dynamics.},
author = {Keavney, D. J. and Han, X. F. and Grimsditch, M. and Meersschaut, J. and Hoffmann, A. and Ji, Y. and Sort, J. and Notues, J. and Divan, R. and Pearson, J. E. and Guslienko, K. Y. and Bader, S. D. and Inst. voor Kern-en Stralingsfysica and INPAC and Univ. Autonoma de Barcelona},
abstractNote = {We report a time-resolved imaging study of the influence of shape on magnetic instabilities in patterned magnetic structures. We find that in rectangular structures magnetization reversal initiates at the ends and interior simultaneously, while in structures with tapered ends the reversal begins in the middle of the structures and spreads out to the ends. The degree of tapering is important for both the switching field and the time required for full reversal. A model based on the concept of local instability regions yields good agreement with the observed location of the reversal onsets.},
doi = {10.1103/PhysRevLett.98.147202},
journal = {Phys. Rev. Lett.},
number = Apr. 6, 2007,
volume = 98,
place = {United States},
year = {Fri Apr 06 00:00:00 EDT 2007},
month = {Fri Apr 06 00:00:00 EDT 2007}
}

Conference:
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