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the Ferromagnetic resonance

Examination of behaviour of magnetisation under the influence of the high-frequency field of a rating put perpendicularly to
Static, was a following step on a trajectory to build-up of the theory ST.

This theory it has been developed in 1949 polderom [2]. In it it was supposed, that amplitude of a field of a rating hи perturbations of magnetisation caused to it are small in comparison with their unperturbed values:

It conducts to occurrence of the right part in the linearized equation (1.1): from which dynamic communication between builders of magnetisation and a rating field follows. In the most simple case of presence only this communication looks like an external field:

Where the rating field is supposed homogeneous and monochromatic with frequency ω, and equilibrium magnetisation - homogeneous and orientirovanoj along an axis z so oscillations occur in a plane hu.

The exchange interaction account leads to occurrence in these expressions of the allowances proportional to quadrate BB SV that complicates the solution of specific targets. However in some interval of not too short lengths of waves it is possible to neglect and consider as these exchange allowances builders of a tensor of a susceptibility equal (1.9). Such approach is termed bezobmennym.

(To = 0) at ω = ω0 = γHкомпоненты magnetisations beyond all bounds increase in a case of the homogeneous oscillations of magnetisation. Actually the signal attenuation account leads to some flattening of these features [2]. Such behaviour is termed as the homogeneous ferromagnetic resonance. Thus specified increase is accompanied by uptake of energy by system.

1.4

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A source: Pojmanov Vladislav Dmitrievich. DISTRIBUTION, DISPERSION And GENERATION of SPIN WAVES To the NONUNIFORM MAGNETIC STRUCTURES. The dissertation on competition of a scientific degree of the candidate of physical and mathematical sciences. Donetsk - 2018. 2018

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