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- W2045340495 abstract "In recent electron-spin-resonance experiments, Benner et al. [J. Magn. Magn. Mater. 45, 354 (1984)] have measured the temperature dependence of the q=0 spin-wave energy for CsNiF3. They have interpreted their data in terms of the thermal renormalizations of the fundamental mass of the classical spin system. The fundamental mass is thermally renormalized by inplane fluctuations and out of plane fluctuations. The experimental data of Benner et al. showed a much smaller temperature dependence than that predicted by the classical theory. In this paper we derive a quantum mechanical expression for the temperature dependence of the fundamental mass, to lowest order in the anharmonic interactions. We find that the quantum expression shows a much smaller temperature dependence of the spin-wave gap than that provided by the classical theory. We note that the high-temperature limit of the quantum expression reduces to the classical expression, with some important changes of the parametrization. This has the result that for systems with small values of the spin, the magnitude of the thermal renormalizations derived from the quantum expression are of much smaller magnitude than those derived on the basis of the purely classical theory. These modifications help to reduce the discrepancy between theory and experiment." @default.
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- W2045340495 date "1987-04-15" @default.
- W2045340495 modified "2023-09-25" @default.
- W2045340495 title "Thermal renormalization of spin‐wave energies" @default.
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- W2045340495 doi "https://doi.org/10.1063/1.338783" @default.
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