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Critical Relaxation of Uniform Precession of Magnetization in Cubic Ferrimagnets
Author(s) -
Berzhanskii V. N.,
Ivanov V. I.
Publication year - 1989
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221510130
Subject(s) - condensed matter physics , precession , magnetization , relaxation (psychology) , curie temperature , spin (aerodynamics) , curie , line width , scattering , phase (matter) , materials science , physics , ferromagnetism , magnetic field , optics , quantum mechanics , thermodynamics , psychology , social psychology
The static (magnetization M ( T ) and susceptibility X ( T ) and the dynamic (magnetic resonance line width Δ‐ B ( T ) properties of cubic ferrimagnets Y 3 Fe 5 O 12 and MnFe 2 O 1 are studied experimentally in the vicinity of the phase transition (PT) into the magnetically‐ordered state. The critical “speeding‐up” of the spin relaxation rate Γ which is available in cubic ferrimagnets is found to be absent. Scattering of the uniform precession of magnetization on the spin waves, including the optical ones, is shown to be the process dominating the relaxation below the Curie temperature T c but not the fluctuation mechanism.