Antiferromagnetism in the Heisenberg Hamiltonian

Majumdar, C. K. (1981) Antiferromagnetism in the Heisenberg Hamiltonian Bulletin of Materials Science, 3 (2). pp. 209-216. ISSN 0250-4707

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Official URL: http://www.ias.ac.in/j_archive/bms/3/1/209-216/vie...

Related URL: http://dx.doi.org/10.1007/BF02908496

Abstract

The shortcomings of the classical theories of antiferromagnetism are reviewed. On the basis of known exact results of several antiferromagnetic models, it is argued that the spin correlation functions may have oscillating behaviour anticipated from the classical Neel states even though the exact ground state is quite different from Neel state. It is also found that as the spin becomes large, the classical results become more and more applicable as seen in Fisher’s model and verified experimentally. A few remarks on the broken symmetry are made. The existence of an anisotropic antiferromagnetic model with Neel states as ground state is pointed out.

Item Type:Article
Source:Copyright of this article belongs to Indian Academy of Sciences.
ID Code:33337
Deposited On:30 Mar 2011 10:59
Last Modified:17 May 2016 16:11

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