Title :
Anisotropy and FMR in cobalt doped YIG films
Author_Institution :
Inst. of Phys., Acad. of Sci., Prague
fDate :
3/1/1994 12:00:00 AM
Abstract :
The temperature dependence of FMR was measured on thin LPE films YIG:Co0.03Ca0.3 and YIG:Co0.06Ge0.65Ca0.7. 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:Co0.03Ca0.3; YIG:Co0.06Ge0.65Ca0.7; 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;
Journal_Title :
Magnetics, IEEE Transactions on
