Abstract
Some transitions between ordered and disordered magnetic states that take place via transitions of first order are tabulated. Among these transitions are some of the order-disorder type. The theoretical basis for such a transition to occur is indicated using a simple physical model that assumes: (1) a strain dependent exchange interaction and (2) a compressible lattice. The necessary condition for first-order behavior is determined, and the theory is compared to the behavior of a real material, MnAs. It is found to be in substantial agreement with the behavior of that compound. The system represented by the simple model employed here possesses ferro-, antiferro-, and paramagnetic states. The equilibrium boundaries between these states are determined in the pressure-temperature plane as an illustration of the possible transitions that may be observed with this model.
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Rodbell, D.S., Bean, C.P. (1962). Some Magnetic First-Order Transitions. In: Osborn, J.A. (eds) Proceedings of the Seventh Conference on Magnetism and Magnetic Materials. Springer, Boston, MA. https://doi.org/10.1007/978-1-4899-6391-8_5
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DOI: https://doi.org/10.1007/978-1-4899-6391-8_5
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