ORIGIN OF COERCIVITY OF Ca-Ge SUBSTITUTED EPITAXIAL YIG CRYSTALS.

M. Pardavi-Horvath, A. Cziraki, I. Fellegvari, G. Vertesy, J. Vandlik, B. Keszei

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Abstract

LPE grown, substituted YIG crystals have coercivities (H//c) in the 10** minus **1 Oe range, depending on compositions and growth conditions. Dislocations, inclusions and surfaces cannot be fully responsible for the observed H//c. TEM investigations of CaGeSmYIG films have revealed a periodically modulated stress field that - via magnetostrictive stresses - may explain the FMR line broadening and the measured H//c. The mechanism, thought to be the spinodal decomposition of the garnet, causes FMR line broadening up to 200-300 Oe, i. e. more than the relaxation of Sm**3** plus ions.

Original languageEnglish
JournalIEEE Transactions on Magnetics
VolumeMAG-20
Issue number5
Publication statusPublished - Sep 1 1984

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ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

Cite this

Pardavi-Horvath, M., Cziraki, A., Fellegvari, I., Vertesy, G., Vandlik, J., & Keszei, B. (1984). ORIGIN OF COERCIVITY OF Ca-Ge SUBSTITUTED EPITAXIAL YIG CRYSTALS. IEEE Transactions on Magnetics, MAG-20(5).