Abstract. It is investigated the
influence of magnetoelastic interaction on magnetization equilibrium position
in normal magnetized double-slides ferrite structure. It is found the connected
motion equations for magnetization and elastic displacement in both slides and
also boundaries conditions on the surface of structure and between the slides.
On the basis of investigation of orientational transition by magnetization in
magnetoelastic medium it is found the dependencies of second kind phase
transition which is the establishment of magnetization vector along the
constant magnetic field direction. It is found the addition to transition field
which is connected with magnetoelastic interaction in both slides. It is shown
that this addition has quadratic character relatively to value of
magnetoelastic constant interaction. It is solved the equilibrium system for
magnetization and elastic displacement in the field interval which recovers the
field of orientation transitions in both cases. It is established the
possibility and it is shown the excitation of equilibrium position of
magnetization (the second order of precession) in both slides. It is
constructed the parametric portraits for elastic displacement components in
both slides. On the basis of parametric portraits analysis for magnetization
components it is found three possible intervals of constant magnetic field
value: lower of transition fields in both slides, between the transition fields
in these slides and above the transition fields in both slides. It is found the
multiregime character of excited elastic vibrations. Over the time-development and
parametric portraits it is found the five different regimes: regime ¹1 –
regular developed beatings; regime ¹2 – alternated beatings; regime ¹3 –
regular forced sinus-line; regime ¹4 – faded forces sinus-line; regime ¹5 –
simple own sinus-line. On the flatness “magnetoelastic constant – established
field” it is investigated the regions of existence of different regimes. It is
found that when field is increased the existence regions change each other on
the succession which is determined by above mentioned numbering. It is
investigated the conversion of beatings corresponding to regime ¹1 and ¹2 which
take place when the magnetoelastic constant is varied but applies field is
constant. It is shown that by small value of magnetoelastic constant the
elastic vibrations are determined by magnetization vibrations which are
determined by applied alternating field. It is shown that by the increasing of
constant the elastic vibrations acquire the character of beatings at first
regular and other alternating after this the vibrations become as sinus-line.
It is investigated the quantity parameters of beatings. It is shown that by the
constant increasing the period of beatings is decreased, maximum and minimum
values of elastic vibrations amplitude increase and the period of excited
elastic vibrations is decreased. For all above mentioned dependencies it is
proposed the empirical formulas linear or quadratic character which determined
the observed results in precision about 10%. It is investigated the question
about the role of imposition of ones slide vibrations to other slide. It is
established the insufficient of described investigation owing to incomplete
symmetry linear component elastic displacement. It is described the possible
variant of task for linear component displacement which takes into
consideration symmetry of both slides. This variant is proposed as the task for
new investigation.
Key words: precession of
magnetization, magnetoelastic interaction, orientation transition.
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