Direct measurement of subnetwork exchange coupling constant for ferrimagnets

Hong Fu, Te ho Wu, Masud Mansuripur

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

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 Tcomp, i.e. H = λM at Tcomp. 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)2541-2543
Number of pages3
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume33
Issue number5 A
StatePublished - May 1994

Fingerprint

ferrimagnets
Exchange coupling
Optical recording
Mean field theory
temperature compensation
Magnetization
plots
recording
Magnetic fields
slopes
Thin films
magnetization
thin films
magnetic fields
Temperature
Compensation and Redress

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

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abstract = "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 Tcomp, i.e. H = λM∥ at Tcomp. 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.",
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AB - 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 Tcomp, i.e. H = λM∥ at Tcomp. 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.

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