Abstract.
By the methods of mathematical modeling
a possibility of stability increase of the magnetic oscillations frequencies in
the single crystal ferrite films regarding change of at once two parameters –
temperature and the parameter, defining chemical composition, is investigated. The considered method of stabilization
is based on an optimal choice of a film crystallographic orientation and a
magnetizing field direction. The
zero values of the frequency first derivatives of temperature and of the varied
chemical element concentration were criteria for optimality. The mathematical model of galliumsubstituted
yttrium iron garnet films is constructed. Comparison between itself of the films
with double stabilization and the films with stabilization of frequency
regarding change of only one parameter is made. In
the last case the films had crystallographic orientation of type {111}, and the
stabilization was realized by the choice of only of the magnetizing field
direction. 3d plots of the
ferromagnetic resonance frequency displacement from change of temperature also
from change of gallium concentration are given. It
is established that in in a case of double stabilization this dependences are
the saddle-shaped surfaces. Recommendations
of a considered method use for stabilization of the devices on the
magnetostatic waves are given.
Key
words:
ferrite film, galliumsubstituted
yttrium iron garnet, magnetic anisotropy, magnetization, ferromagnetic resonance, frequency stabilization.
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