Critical behaviour in a field for uniaxial ferroelectrics and ferromagnets with dipolar interactionReport as inadecuate




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Abstract : The purpose of this paper is to obtain the logarithmic critical singularities for uniaxial dipolar systems or for the four dimensional theory in non zero external field. The result takes a simple form only for n = 1, n being the number of components of the order parameter. For example the inverse magnetic susceptibility behaves as χ-1 ∼ χ -1m.f. | log χ-1m.f. |-1-3 in which m.f. refers to mean field value when H is non zero.

Keywords : ferroelectric transitions ferromagnetism magnetic susceptibility magnetic transitions of substances uniaxial ferroelectrics dipolar interaction critical singularities uniaxial dipolar systems uniaxial ferromagnets non zero field





Author: C. Bervillier

Source: https://hal.archives-ouvertes.fr/



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