Second Order Precession in the Plate with Cubic Anisotropy and Magnetoelastic Properties

2015 ◽  
Vol 233-234 ◽  
pp. 73-78 ◽  
Author(s):  
M.S. Kirushev ◽  
Vladimir S. Vlasov ◽  
D.A. Pleshev ◽  
F.F. Asadullin ◽  
Leonid N. Kotov ◽  
...  
Keyword(s):  
Magnetization Vector ◽  
Second Order ◽  
Ferrite Plate ◽  
Magnetoelastic Properties ◽  
Cubic Anisotropy

The paper considers the second order precession of the magnetization vector in a perpendicular magnetized anisotropic ferrite plate with magnetoelastic properties. The boundaries of the precession regimes on the frequency and amplitude of the alternating field were defined. The features of the precession of the magnetization vector regimes associated with magnetoelastic properties were revealed.

Investigation of Nonlinear Dynamics of Magnetoelastic Oscillations in Normal Magnetized Ferrite Plate

2015 ◽  
Vol 233-234 ◽  
pp. 471-475 ◽  
Author(s):  
D.A. Pleshev ◽  
Vladimir S. Vlasov ◽  
Leonid N. Kotov ◽  
F.F. Asadullin ◽  
S.M. Poleshikov ◽  
...  
Keyword(s):  
Nonlinear Dynamics ◽  
Differential Equations ◽  
Ordinary Differential Equations ◽  
Ferromagnetic Resonance ◽  
Magnetization Vector ◽  
Step Length ◽  
Interaction Constant ◽  
Magnetoelastic Interaction ◽  
Ferrite Plate ◽  
Dissipation Parameter

The present work deals with investigation of features of a magnetization vector of nonlinear precession and elastic displacements close to ferromagnetic resonance in normal magnetized ferrite plate. The system of ordinary differential equations was solved numerically by the Runge-Kutta 7-8 orders method with control of the integration at every step length. The possible excitation of magnetoelastic autooscillations was found out in the paper. Two mechanisms of autooscillations: reorientation and detuning were investigated. The boundaries between the regular and chaotic reorientation autooscillations depending on the magnetic dissipation parameter and magnetoelastic interaction constant were determined.

Temperature dependence of the first-and second-order cubic anisotropy constants in EuO

1974 ◽  
Vol 9 (5) ◽  
pp. 2394-2398 ◽  
Author(s):  
Richard S. Hughes ◽  
Glen E. Everett ◽  
A. W. Lawson
Keyword(s):  
Temperature Dependence ◽  
Second Order ◽  
Cubic Anisotropy

scholarly journals Determination of magnetoelastic oscillations in ferrite plate with different values of anisotropy constant

2018 ◽  
Vol 185 ◽  
pp. 02005
Author(s):  
Leonid Kotov ◽  
Pavel Severin ◽  
Vladimir Vlasov ◽  
Dmitry Beznosikov
Keyword(s):  
Simulated Annealing ◽  
Magnetization Vector ◽  
Anisotropy Constant ◽  
External Fields ◽  
Ferrite Plate ◽  
Simulated Annealing Method ◽  
Material Parameters ◽  
Additional Constraints ◽  
Annealing Method

The maximum amplitudes of magnetic and elastic oscillations are calculated at various material parameters and parameters of external fields. Normally and tangentially magnetized anisotropic magnetic plates were considered. To obtain the maximum amplitudes with additional constraints, the simulated annealing method was used. The behaviour of the magnetic and elastic components of the oscillations was considered. The changes in the position of the magnetization vector and the equilibrium displacements as a function of the first anisotropy constant were revealed.

The second-order magnetization precession in an anisotropic medium. Part 2: The cubic anisotropy

2013 ◽  
Vol 58 (9) ◽  
pp. 847-862 ◽  
Author(s):  
V. S. Vlasov ◽  
M. S. Kirushev ◽  
L. N. Kotov ◽  
V. G. Shavrov ◽  
V. I. Shcheglov
Keyword(s):  
Anisotropic Medium ◽  
Second Order ◽  
Magnetization Precession ◽  
Cubic Anisotropy

Disappearance Voltage Determinations Using a Convergent Beam

1971 ◽  
Vol 29 ◽  
pp. 184-185
Author(s):  
W. L. Bell
Keyword(s):  
Second Order ◽  
Objective Method ◽  
Uniform Thickness ◽  
Rocking Curve ◽  
Crystal Perfection ◽  
Kikuchi Line ◽  
Central Maximum ◽  
Diffraction Patterns ◽  
Convergent Beam ◽  
Beam Technique

Disappearance voltages for second order reflections can be determined experimentally in a variety of ways. The more subjective methods, such as Kikuchi line disappearance and bend contour imaging, involve comparing a series of diffraction patterns or micrographs taken at intervals throughout the disappearance range and selecting that voltage which gives the strongest disappearance effect. The estimated accuracies of these methods are both to within 10 kV, or about 2-4%, of the true disappearance voltage, which is quite sufficient for using these voltages in further calculations. However, it is the necessity of determining this information by comparisons of exposed plates rather than while operating the microscope that detracts from the immediate usefulness of these methods if there is reason to perform experiments at an unknown disappearance voltage.The convergent beam technique for determining the disappearance voltage has been found to be a highly objective method when it is applicable, i.e. when reasonable crystal perfection exists and an area of uniform thickness can be found. The criterion for determining this voltage is that the central maximum disappear from the rocking curve for the second order spot.

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