Direct Measurement of Subnetwork Exchange Coupling Constant for Ferrimagnets

Hong Fu, Te Ho Wu, M. Mansuripur

Research output: Contribution to journalArticlepeer-review

4 Scopus citations


We show that the subnetwork exchange coupling constant λ of ferrimagnetic films is equal to the slope of the plot of the magnetic field H applied in the film plane versus the in-plane magnetization M at compensation temperature T comp i.e. H=λM at T comp. This finding enables the direct measurement of λ for ferrimagnetic magneto-optical recording thin films regardless of the complexity of the two-subnetwork problem. The experimental results are within the range predicted by the mean-field theory.

Original languageEnglish (US)
Pages (from-to)2541
Number of pages1
JournalJapanese Journal of Applied Physics
Issue number5R
StatePublished - May 1994

ASJC Scopus subject areas

  • General Engineering
  • General Physics and Astronomy


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