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- W1991465578 abstract "A comparative study has been carried out on the magnetic properties of the Heisenberg-like models with and without internal spin fluctuations. A two-spins-per-site Heisenberg-like model is used to mimic the internal spin fluctuations inside atoms. Using the double-time Green's function decoupling method, we have calculated the magnetization and paramagnetic susceptibility of the model Hamiltonians for different atomic spins as functions of the temperature and exchange energies. Our study suggests that the internal spin fluctuations generally reduce the transition temperature, and modify the magnetic behaviours. Unlike the results obtained by using the usual Heisenberg model, our results show that the Curie constant of the two-spins-per-site Heisenberg model depends on the individual moments, rather than on the resultant saturated magnetic moment. The possible physical implication of our result is also discussed." @default.
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- W1991465578 date "1997-06-30" @default.
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- W1991465578 title "A comparative study of Heisenberg-like models with and without internal spin fluctuations" @default.
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- W1991465578 doi "https://doi.org/10.1088/0953-8984/9/26/012" @default.
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