Estimation of critical exponents for the ferroelectric transition in Mn2+-doped tris-sarcosine calcium chloride (TSCC) by means of EPR

Abstract

Abstract The static rotation angle of the EPR fine-structure tensor of Mn 2+ centers of ferroelectric TSCC correlates with the order parameter. Its temperature dependence shows two distinct regions. In the vicinity of the phase transition temperature the critical exponent is β = 0.322 ± 0.012, below this critical region its temperature dependence points at a phase transition of weak first order.