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Thermodynamics of the two-dimensional ferromagnetic Heisenberg spin systems |
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| Authors: | K. Yamaji J. Kondo |
| Affiliation: | Electrotechnical Laboratory, Tanashi, Tokyo, Japan |
| Abstract: | The problem of the title is studied by means of the Green function formalism with decoupling at a stage one-step further than Tyablikov's theory. At low temperatures the specific heat is proportional to the temperature T and the magnetic susceptibility to exp (constant/T)/T. |
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