Spin fluctuations in EuS above TC <atother>@B: Comparison with asymptotic renormalization-group theory

P. Böni; G. Shirane; H. G. Bohn; W. Zinn

doi:10.1063/1.340906

Spin fluctuations in EuS above T_C <atother>@B: Comparison with asymptotic renormalization-group theory

P. Böni, G. Shirane, H. G. Bohn, W. Zinn

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Abstract

Constant-energy scans in neutron scattering provide a very sensitive tool for testing theoretical line shapes in detail. In order to verify the predictions of asymptotic renormalization-group theory for isotropic ferromagnets above T_C we measured the temperature dependence of the paramagnetic scattering from the Heisenberg ferromagnet EuS. The width of the constant-E peaks increases with increasing temperature as predicted. Surprisingly the positions do not scale. The nonuniversal behavior is attributed to the crossover from isotropic to dipolar dynamics.

Original language	English
Pages (from-to)	3089-3091
Number of pages	3
Journal	Journal of Applied Physics
Volume	63
Issue number	8
DOIs	https://doi.org/10.1063/1.340906
State	Published - 1988
Externally published	Yes

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title = "Spin fluctuations in EuS above TC @B: Comparison with asymptotic renormalization-group theory",

abstract = "Constant-energy scans in neutron scattering provide a very sensitive tool for testing theoretical line shapes in detail. In order to verify the predictions of asymptotic renormalization-group theory for isotropic ferromagnets above TC we measured the temperature dependence of the paramagnetic scattering from the Heisenberg ferromagnet EuS. The width of the constant-E peaks increases with increasing temperature as predicted. Surprisingly the positions do not scale. The nonuniversal behavior is attributed to the crossover from isotropic to dipolar dynamics.",

author = "P. B{\"o}ni and G. Shirane and Bohn, {H. G.} and W. Zinn",

year = "1988",

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AU - Shirane, G.

AU - Bohn, H. G.

AU - Zinn, W.

PY - 1988

Y1 - 1988

N2 - Constant-energy scans in neutron scattering provide a very sensitive tool for testing theoretical line shapes in detail. In order to verify the predictions of asymptotic renormalization-group theory for isotropic ferromagnets above TC we measured the temperature dependence of the paramagnetic scattering from the Heisenberg ferromagnet EuS. The width of the constant-E peaks increases with increasing temperature as predicted. Surprisingly the positions do not scale. The nonuniversal behavior is attributed to the crossover from isotropic to dipolar dynamics.

AB - Constant-energy scans in neutron scattering provide a very sensitive tool for testing theoretical line shapes in detail. In order to verify the predictions of asymptotic renormalization-group theory for isotropic ferromagnets above TC we measured the temperature dependence of the paramagnetic scattering from the Heisenberg ferromagnet EuS. The width of the constant-E peaks increases with increasing temperature as predicted. Surprisingly the positions do not scale. The nonuniversal behavior is attributed to the crossover from isotropic to dipolar dynamics.

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Spin fluctuations in EuS above T_C <atother>@B: Comparison with asymptotic renormalization-group theory

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