Abstract:
A power-law formula with a critical exponent (Formula presented.) was used to analyze the anomalous behavior of the specific heat for guanidine zinc sulfate (GZS) crystal close to the phase transition temperature of TC = 178.4 K. The obtained values of 0.13 and 0.14 for (Formula presented.) below (T < TC) and above (T > TC) the phase transition temperature, respectively, were almost the same value of 0.13 (1/8) that predicted from the 3-D Ising model. Also, the internal energy (Formula presented.) the entropy (Formula presented.) and the free energy (Formula presented.) of this crystal were calculated as a function of temperature close to the phase transition temperature of TC = 178.4 K.