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

Authors :
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.
Source :
Applied Physics Letters; 6/8/2009, Vol. 94 Issue 23, p233103, 3p, 1 Diagram, 1 Chart, 3 Graphs
Publication Year :
2009

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. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
00036951
Volume :
94
Issue :
23
Database :
Complementary Index
Journal :
Applied Physics Letters
Publication Type :
Academic Journal
Accession number :
41573090
Full Text :
https://doi.org/10.1063/1.3151859