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Critical Behavior of the Heisenberg Ferromagnets EuO and EuS

✍ Scribed by Als-Nielsen, J.; Dietrich, O.; Kunnmann, W.; Passell, L.


Book ID
115500058
Publisher
The American Physical Society
Year
1971
Tongue
English
Weight
251 KB
Volume
27
Category
Article
ISSN
0031-9007

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The method of thermal boson expansion [1] is extended to the Heisenberg model with spins S/> 1 and applied to the ferromagnetic insulators EuO and EuS. Taking in the momentum space an adequate cut-off, which is almost independent of the spin, a good guess of the critical temperature is made. The te