Major loop reconstruction from switching of individual particles

Guobao Zheng, Martha Pardavi-Horvath, G. Vértesy

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

Major hysteresis loops of groups of isolated 60 μm square garnet particles of a regular two-dimensional array, have been measured magnetooptically. Individual loops for each particle were measured, and the statistics of the distribution of coercivities and interaction fields was determined, It is shown that from the measured coercivity distribution and calculated magnetostatic interaction fields the major hysteresis loop can be reconstructed. The switching sequence, and the major loop of an assembly of 5×5 particles were calculated numerically for two cases: first, when calculating the magnetostatic interaction, the 25 particles were assumed to be isolated; second, the major loop of the same 25 particles, embedded into a 9×9 square, was reconstructed taking into account the interactions among all 81 particles. The numerically simulated major hysteresis loops agree very well with the measured loops, demonstrating the reliability of numerical modeling.

Original languageEnglish
Pages (from-to)5591-5593
Number of pages3
JournalJournal of Applied Physics
Volume81
Issue number8 PART 2B
Publication statusPublished - Apr 15 1997

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hysteresis
magnetostatics
coercivity
interactions
garnets
assembly
statistics

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physics and Astronomy (miscellaneous)

Cite this

Major loop reconstruction from switching of individual particles. / Zheng, Guobao; Pardavi-Horvath, Martha; Vértesy, G.

In: Journal of Applied Physics, Vol. 81, No. 8 PART 2B, 15.04.1997, p. 5591-5593.

Research output: Contribution to journalArticle

Zheng, G, Pardavi-Horvath, M & Vértesy, G 1997, 'Major loop reconstruction from switching of individual particles', Journal of Applied Physics, vol. 81, no. 8 PART 2B, pp. 5591-5593.
Zheng G, Pardavi-Horvath M, Vértesy G. Major loop reconstruction from switching of individual particles. Journal of Applied Physics. 1997 Apr 15;81(8 PART 2B):5591-5593.
Zheng, Guobao ; Pardavi-Horvath, Martha ; Vértesy, G. / Major loop reconstruction from switching of individual particles. In: Journal of Applied Physics. 1997 ; Vol. 81, No. 8 PART 2B. pp. 5591-5593.
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