摘要: Some transitions between ordered and disordered magnetic states that take place via of first order are tabulated. Among these some the order-disorder type. The theoretical basis for such a transition to occur is indicated using simple physical model assumes: (1) strain dependent exchange interaction (2) compressible lattice. necessary condition first-order behavior determined, theory compared real material, MnAs. It found be in substantial agreement with compound. system represented by employed here possesses ferro-, antiferro-, paramagnetic states. equilibrium boundaries determined pressure-temperature plane as an illustration possible may observed this model.
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