Anisotropy and FMR in cobalt doped YIG films

Author

Marysko, M.

Author_Institution

Inst. of Phys., Acad. of Sci., Prague

Volume

30

Issue

2

fYear

1994

fDate

3/1/1994 12:00:00 AM

Firstpage

978

Lastpage

980

Abstract

The temperature dependence of FMR was measured on thin LPE films YIG:Co_0.03Ca_0.3 and YIG:Co_0.06Ge_0.65Ca_0.7. The measured value of K₁ was used to estimate Co²⁺(a) and Co ³⁺(d) content. For YIG:Co,Ge,Ca the large increase of FMR linewidth towards lower temperatures was observed. The angular dependence of linewidth was compared with the calculation based on the inhomogeneous anisotropy field model. It is suggested that the low temperature increase of ΔII is caused predominantly by fluctuations in the cubic anisotropy field, having its origin in an inhomogeneous distribution of Ca²⁺ ions within the film

Keywords

calcium; cobalt; ferromagnetic resonance; garnets; germanium; magnetic anisotropy; magnetic epitaxial layers; yttrium compounds; FMR; YFe5O12:Co,Ge,Ca; YIG:Co films; YIG:Co,Ge,Ca; YIG:Co,Ge,Co; YIG:Co_0.03Ca_0.3; YIG:Co_0.06Ge_0.65Ca_0.7; anisotropy; cubic anisotropy field; inhomogeneous anisotropy field model; linewidth; low temperature; temperature dependence; thin LPE films; Anisotropic magnetoresistance; Calcium; Cobalt; Magnetic field measurement; Magnetic films; Magnetic properties; Magnetic resonance; Physics; Temperature dependence; Temperature measurement;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.312464

Filename

312464