Size effects on switching field of ring-shaped permalloy elements

C. C. Chang, Y. C. Chang, Jong-Ching Wu, Z. H. Wei, M. F. Lai, C. R. Chang, J. H. Kuo

Research output: Contribution to journalConference article

4 Citations (Scopus)

Abstract

The magnetization switching behavior of permalloy ring elements as a function of ring diameter and film thickness by magnetoresistance measurement is presented. The permalloy ring elements, with diameters of 2-5μm and a thickness of 14-66nm, were fabricated by electron beam lithography through a lift-off process. The switching field for the transition from the vortex state to the onion state increases with decreasing size. Furthermore, the switching field increases with increasing thickness up to a critical value of about 53-65nm, over which the switching field tends to decrease with increasing thickness.

Original languageEnglish
Pages (from-to)351-354
Number of pages4
JournalJournal of Magnetism and Magnetic Materials
Volume282
Issue number1-3
DOIs
Publication statusPublished - 2004 Nov 1
EventInternational Symposium on Advanced Magnetic Technologies - Taipei, Taiwan
Duration: 2003 Nov 132003 Nov 16

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Permalloys (trademark)
rings
Electron beam lithography
Magnetoresistance
Film thickness
Magnetization
Vortex flow
film thickness
lithography
electron beams
vortices
magnetization

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Chang, C. C., Chang, Y. C., Wu, J-C., Wei, Z. H., Lai, M. F., Chang, C. R., & Kuo, J. H. (2004). Size effects on switching field of ring-shaped permalloy elements. Journal of Magnetism and Magnetic Materials, 282(1-3), 351-354. https://doi.org/10.1016/j.jmmm.2004.04.082
Chang, C. C. ; Chang, Y. C. ; Wu, Jong-Ching ; Wei, Z. H. ; Lai, M. F. ; Chang, C. R. ; Kuo, J. H. / Size effects on switching field of ring-shaped permalloy elements. In: Journal of Magnetism and Magnetic Materials. 2004 ; Vol. 282, No. 1-3. pp. 351-354.
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Size effects on switching field of ring-shaped permalloy elements. / Chang, C. C.; Chang, Y. C.; Wu, Jong-Ching; Wei, Z. H.; Lai, M. F.; Chang, C. R.; Kuo, J. H.

In: Journal of Magnetism and Magnetic Materials, Vol. 282, No. 1-3, 01.11.2004, p. 351-354.

Research output: Contribution to journalConference article

TY - JOUR

T1 - Size effects on switching field of ring-shaped permalloy elements

AU - Chang, C. C.

AU - Chang, Y. C.

AU - Wu, Jong-Ching

AU - Wei, Z. H.

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AU - Chang, C. R.

AU - Kuo, J. H.

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AB - The magnetization switching behavior of permalloy ring elements as a function of ring diameter and film thickness by magnetoresistance measurement is presented. The permalloy ring elements, with diameters of 2-5μm and a thickness of 14-66nm, were fabricated by electron beam lithography through a lift-off process. The switching field for the transition from the vortex state to the onion state increases with decreasing size. Furthermore, the switching field increases with increasing thickness up to a critical value of about 53-65nm, over which the switching field tends to decrease with increasing thickness.

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