TITLE

Variation of magnetization reversal in pseudo-spin-valve elliptical rings

AUTHOR(S)
Yu, C.; Chiang, T. W.; Chen, Y. S.; Cheng, K. W.; Chen, D. C.; Lee, S. F.; Liou, Y.; Hsu, J. H.; Yao, Y. D.
PUB. DATE
June 2009
SOURCE
Applied Physics Letters;6/8/2009, Vol. 94 Issue 23, p233103
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
We studied nanoscale elliptical ring shaped NiFe/Cu/NiFe trilayer pseudo-spin-valve structures. The magnetization reversal processes showed simultaneous-reversal single-step transition or double-step transition involving flux closure states. For various aspect ratios (short axis to long axis) and linewidths, transition between single-step and double-step magnetization reversals was measured to form a phase diagram. When the linewidth was reduced, edge roughness became important. Simulations of the magnetization reversal behavior agreed qualitatively with our results.
ACCESSION #
41573090

 

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