Intrinsic relaxation of the ferromagnetic resonance in substituted yttrium iron garnets

Journal Article · Sat Sep 01 00:00:00 EDT 1984 · IEEE Trans. Magn.; (United States)

DOI:https://doi.org/10.1109/TMAG.1984.1063481· OSTI ID:5053569

Roschmann, P

The intrinsic loss properties of the ferromagnetic resonance (FMR) in Ga, Al, Sc and V substituted iron garnets have been investigated at different temperatures from T=77 K up to the Curie temperature by FMR measurements as a function of frequency. After separation of masking two-magnon scattering contributions the intrinsic losses of the bulk single crystal materials were resolved in terms of the dimensionless Landau-Lifshitz damping parameter ..cap alpha.. /sub f/ . The results of ..cap alpha.. /sub f/ (T) obtained for different temperatures were found to increase linearly versus 1/4..pi..M /sub s/ (T), the reciprocal of the respective saturation magnetization. Apart from the region of magnetic compensation the intrinsic FMR losses for 100 K < T < T /sub c/ have been related directly to thermomagnetic properties of substituted YIG using nearly invariant matching parameters.

• Research Organization: Philips GmbH Forschungslaboratorium Hamburg, D-2000 Hamburg
• OSTI ID: 5053569
• Journal Information: IEEE Trans. Magn.; (United States), Vol. MAG-20:5
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
FERRITE GARNETS
FERROMAGNETIC RESONANCE
RELAXATION LOSSES
ALUMINIUM
FREQUENCY DEPENDENCE
GALLIUM
LANDAU DAMPING
MONOCRYSTALS
RESPONSE FUNCTIONS
SCANDIUM
VANADIUM
YTTRIUM
CRYSTALS
DAMPING
ELEMENTS
ENERGY LOSSES
FUNCTIONS
LOSSES
MAGNETIC RESONANCE
METALS
MINERALS
RESONANCE
SILICATE MINERALS
TRANSITION ELEMENTS
360603* - Materials- Properties