Magnetic anisotropy and relaxation of FE4+ and FE2+ in CA: YIG and GE:YIG

M. Pardavi-Horvath, G. Vértesy, P. E. Wigen, P. DeGasperis

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

The behavior of iron in valence states of Fe4+ and Fe2+ has been investigated by measurements of the angular and temperature dependence of the FMR resonance field and linewidth at 9.2 GHz from 4.2 to 295 K on (111) oriented Ca0.142 + Fe4+:YIG and Ge0.104 + Fe2+: YIG epitaxial garnet films. At low temperatures a substantial increase of the first and second order cubic anisotropy energy has been observed, with K1>0 and K20 for Fe4+containing garnets. However, the magnitude of K1and K2 is much smaller than predicted. In Ca:YIG a change in sign of dK/dT is observed at T

Original languageEnglish
Pages (from-to)3730-3732
Number of pages3
JournalIEEE Transactions on Magnetics
Volume23
Issue number5
DOIs
Publication statusPublished - 1987

Fingerprint

Magnetic relaxation
Magnetic anisotropy
yttrium-iron garnet
Garnets
Ferromagnetic resonance
anisotropy
Linewidth
Anisotropy
Iron
garnets
Temperature
valence
iron
temperature dependence
energy

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials
  • Physics and Astronomy (miscellaneous)

Cite this

Magnetic anisotropy and relaxation of FE4+ and FE2+ in CA : YIG and GE:YIG. / Pardavi-Horvath, M.; Vértesy, G.; Wigen, P. E.; DeGasperis, P.

In: IEEE Transactions on Magnetics, Vol. 23, No. 5, 1987, p. 3730-3732.

Research output: Contribution to journalArticle

Pardavi-Horvath, M. ; Vértesy, G. ; Wigen, P. E. ; DeGasperis, P. / Magnetic anisotropy and relaxation of FE4+ and FE2+ in CA : YIG and GE:YIG. In: IEEE Transactions on Magnetics. 1987 ; Vol. 23, No. 5. pp. 3730-3732.
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