Magnetization reversal and defects in Co/Pt multilayers

J. X. Shen, R. D. Kirby, K. Wierman, Z. S. Shan, D. J. Sellmyer, T. Suzuki

Research output: Contribution to journalArticle

40 Citations (Scopus)

Abstract

(Co 3 Å/Pt 10 Å)×N (N=8, 16, and 30 bilayers) multilayer thin films were prepared by sputtering onto an 850-Å-thick SiN layer that had been deposited on a silicon (111) substrate. We used the polar Kerr effect to measure the time dependence of magnetization reversal over the temperature range 90-300 K. Direct domain observations were also carried out. The results show that the domain expansion process depends strongly on the number of bilayers. Uniform domain expansion was found only in the thinner samples. From the time dependence of the magnetization reversal measurements over the temperature range 90-300 K, the activation energy and volume associated with domain wall motion were found to be 1.2 eV and 2.3×10-18 cm3 for N=8 sample. The N=16 and N=30 samples seem to have a broad distribution of activation energies. Our observations suggest that both the coercivity and magnetization reversal are controlled by the defects that come from the interface between the Co and Pt.

Original languageEnglish (US)
Pages (from-to)6418-6420
Number of pages3
JournalJournal of Applied Physics
Volume73
Issue number10
DOIs
StatePublished - Dec 1 1993

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magnetization
time dependence
defects
activation energy
expansion
Kerr effects
coercivity
domain wall
sputtering
temperature
silicon
thin films

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Shen, J. X., Kirby, R. D., Wierman, K., Shan, Z. S., Sellmyer, D. J., & Suzuki, T. (1993). Magnetization reversal and defects in Co/Pt multilayers. Journal of Applied Physics, 73(10), 6418-6420. https://doi.org/10.1063/1.352618

Magnetization reversal and defects in Co/Pt multilayers. / Shen, J. X.; Kirby, R. D.; Wierman, K.; Shan, Z. S.; Sellmyer, D. J.; Suzuki, T.

In: Journal of Applied Physics, Vol. 73, No. 10, 01.12.1993, p. 6418-6420.

Research output: Contribution to journalArticle

Shen, JX, Kirby, RD, Wierman, K, Shan, ZS, Sellmyer, DJ & Suzuki, T 1993, 'Magnetization reversal and defects in Co/Pt multilayers', Journal of Applied Physics, vol. 73, no. 10, pp. 6418-6420. https://doi.org/10.1063/1.352618
Shen, J. X. ; Kirby, R. D. ; Wierman, K. ; Shan, Z. S. ; Sellmyer, D. J. ; Suzuki, T. / Magnetization reversal and defects in Co/Pt multilayers. In: Journal of Applied Physics. 1993 ; Vol. 73, No. 10. pp. 6418-6420.
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