MnP has a triple point where paramagnetic, ferromagnetic, and helicoidal (fan) phases meet. The following features of this point agree with those expected for a Lifshitz point: the order of the various transitions near this point (first or second); the qualitative shapes of the phase boundaries; the crossover exponent φ obtained from the phase boundaries; the variation of the wave vector q↘ in the fan phase; the exponent βk derived from this variation; and dispersion curves for spin waves.
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Y. Shapira (1982) studied this question.
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