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- W2018016736 abstract "Abstract The dynamical structure function S ( k , ω) is obtained in the form of Mori's continued fraction for a diluted Heisenberg spin system with competing interaction on the fcc lattice. Frequency and wave dependent moments of S ( k ,ω), 〈ω n 〉 k ( n =0, 2,4 and 6) are calculated by means of the high-temperature series expansion method. Based on the calculation of S ( k ,ω) for two europium chalcogenides, EuO and EuS, the frustration effects are studied in the critical region from the dynamical point of view. In the unfrustrated system the diffusive modes are dominant and damped propagation modes are found near the zone boundary; however, in the frustrated system the propagating modes are hardly observed depending on direction the wave vector." @default.
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- W2018016736 date "1992-02-01" @default.
- W2018016736 modified "2023-09-27" @default.
- W2018016736 title "Spin dynamics in diluted paramagnets with competing interactions" @default.
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- W2018016736 doi "https://doi.org/10.1016/0304-8853(92)90786-n" @default.
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