The magnetoelastic ultra-sound pulses propagation in poly-crystal yttrium iron garnet plates in conditions of nonuniform intrinsic field.
Part 1. Transverse magnetization
D. S. Beznosikov 1, V. S. Vlasov 1, V. G. Shavrov
2, V. I. Shcheglov 2
1 Syktyvkar State University, Syktyvkar, Russia
2 Kotel’nikov Institute of Radio Engineering and Electronics, Moscow, Russia
The paper is received on September 16, 2014
Abstract. The experimental
investigation of transverse elastic waves propagation in poly-crystal yttrium
iron garnet specimens biased by magnetic field normal to propagation wave direction
is made. For theoretical interpretation of observed phenomena it is proposed
the model of domain magnetization vectors orientational transition. It is found
the phenomenon of orientational transition delay. For its interpretation the
model of asymmetrical increasing of different signs closed domain fields is
proposed. It is found two mechanisms of elastic wave decay in specimen with
domains: the swing magnetization vectors and exchange waves excitation. It is
shown that theoretical model results describe the experiments in accuracy not
less than 5%.
Key words: elastic wave, damping,
magnetoelastic interaction, domain structure.