Abstract
The spin-exchange operator for spin S=1 and a constant-coupling-like approximation are used to evaluate the thermodynamic properties of a system described by a two-spin Hamiltonian that includes dipole and quadrupole interactions. The dipole and quadrupole moments and the exchange energy are found as functions of temperature. There is a critical temperature, Tc, which depends on the coordination number of the lattice at which the system undergoes a second-order phase transition. Below Tc, both magnetic moments, simultaneously, take on nonzero values and have infinite derivatives there while the derivative of the exchange energy is discontinuous. Comparison is made with other results where possible and reasonable agreement found. © 1985 The American Physical Society.
Recommended Citation
H. A. Brown, "Spin-1 Exchange-interaction Model Of Ferromagnetism," Physical Review B, vol. 31, no. 5, pp. 3118 - 3120, American Physical Society, Jan 1985.
The definitive version is available at https://doi.org/10.1103/PhysRevB.31.3118
Department(s)
Physics
International Standard Serial Number (ISSN)
0163-1829
Document Type
Article - Journal
Document Version
Final Version
File Type
text
Language(s)
English
Rights
© 2023 American Physical Society, All rights reserved.
Publication Date
01 Jan 1985
