Title :
Magnetooptical detection of standing longitudinal hypersound waves excited by uniform FMR mode
Author :
Romanov, Dmitriy A. ; Rudashevsky, Evgeniy G. ; Nikolaev, Evgeniy I.
Author_Institution :
General Phys. Inst., Moscow, Russia
fDate :
11/1/1993 12:00:00 AM
Abstract :
The ferromagnetic resonance (FMR) of Bi-containing LPE garnet film on a GGG substrate has been investigated at frequencies of 0.4-1.2 GHz. FMR magnetooptical detection has been used to measure the magnetization precession amplitude. It was found that a strong interaction between precessing magnetization in the garnet film and longitudinal standing elastic waves in the film/substrate structure is possible only if external magnetic field is inclined on a small angle with respect to the film plate. Such elastic resonances lead to a fine structure of the FMR line. The dependence of the efficiency of this effect upon external magnetic field direction and magnetization orientation was studied experimentally and theoretically
Keywords :
bismuth compounds; ferrimagnetic properties of substances; ferromagnetic resonance; garnets; magnetic epitaxial layers; magneto-optical effects; magnetoelastic waves; 0.4 to 1.2 GHz; Bi3Fe5O12; GdGG substrate; GdGa5O12; LPE garnet film; elastic resonances; external magnetic field direction; magnetization orientation; magnetization precession amplitude; magnetooptical detection; standing longitudinal hypersound waves; uniform FMR mode; Frequency; Garnet films; Magnetic field measurement; Magnetic films; Magnetic resonance; Magnetoelasticity; Magnetooptic effects; Optical polarization; Saturation magnetization; Substrates;
Journal_Title :
Magnetics, IEEE Transactions on
