Abstract
The Heinsenberg theory of ferromagnetism has been treated by many types of approximations; one of the more successful is known as constant coupling. The literature constants several different ways of arriving at results like those of the constant-coupling approximation, but proofs that they are indeed equivalent are lacking in some cases. It is shown that two of these methods are equivalent for spin 1/2 and explicitly demonstrated that both yield exactly the constant-coupling results, though simpler in use and concept than the latter. Finally, it is shown that one of the two methods yields the same Curie temperatures as constant coupling for all spin. © 1977, American Association of Physics Teachers. All rights reserved.
Recommended Citation
H. A. Brown, "Heisenberg Theory Of Ferromagnetism: Constant Coupling Revisited," American Journal of Physics, vol. 45, no. 8, pp. 707 - 710, American Association of Physics Teachers, Jan 1977.
The definitive version is available at https://doi.org/10.1119/1.10778
Department(s)
Physics
International Standard Serial Number (ISSN)
1943-2909; 0002-9505
Document Type
Article - Journal
Document Version
Final Version
File Type
text
Language(s)
English
Rights
© 2023 The Authors, All rights reserved.
Publication Date
01 Jan 1977
