Using Harmonic Analysis to Determine the Coefficients of Expansion in the Electrical Energy of a Rb2ZnCl4 Crystal from Its Polarization

Values of the expansion coefficients of electrical energy W c in a series with respect to even powers of polarization P c are determined using the Landau–Devonshire theory by studying the repolarization dynamics of an Rb 2 ZnCl 4 crystal. Experimental results obtained from the dynamics are compared to theoretical representations of the Landau–Devonshire theory that describe the dependences of W c ( P c ) in statics.