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Teoreticheskaya i Matematicheskaya Fizika, 1979, Volume 38, Number 3, Pages 422–430
(Mi tmf2593)
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This article is cited in 1 scientific paper (total in 1 paper)
Critical dynamics of an impurity spin in a perromagnet above $T_C$
M. I. Auslender, A. B. Zolotovitskii
Abstract:
An approximate expression is obtained for the isothermal Green's function for the magnetic moment of an interstitial impurity in a ferromagnet in the upper kinetic region $(T\gtrsim T_C)$. This expression is used to analyze the behavior of the Green's function in the time representation in three temperature intervals near $T_C$. It is shown that the asymptotic behaviors
of the Green's function at large times contain weakly damped power-law “tails” of two types, these being, respectively, the contributions of the hydrodynamic and critical spin modes of the ferromagnet. It is found that in the two regions closest to $T_C$ there does not exist a purely relaxation regime in the behavior of the considered Green's function.
Received: 02.03.1978
Citation:
M. I. Auslender, A. B. Zolotovitskii, “Critical dynamics of an impurity spin in a perromagnet above $T_C$”, TMF, 38:3 (1979), 422–430; Theoret. and Math. Phys., 38:3 (1979), 279–284
Linking options:
https://www.mathnet.ru/eng/tmf2593 https://www.mathnet.ru/eng/tmf/v38/i3/p422
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Abstract page: | 201 | Full-text PDF : | 83 | References: | 30 | First page: | 1 |
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