Abstract
An expression for the martensitic transition temperature T M for electrons in a two-fold, degenerate band has been derived incorporating the effect of the intra-atomic Coulomb and exchange interactions in the Hartree—Fock approximation in the presence of an external magnetic field. As a result the field dependence of T M can be considerably enhanced which has been found experimentally in the case of La 3S 4. It is also shown that for certain form of the density of states the onset of ferromagnetism can completely suppress the structural transition.
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