A THERMODYNAMIC APPROACH OF STRUCTURAL SECOND-ORDER PHASE TRANSITION AND THE DISCONTINUITY OF THE SPECIFIC HEAT IN SOLIDS
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The purpose of this work is simply to present the thermodynamic theory of the structural phase transition in solids. Second-order phase transition will be described in detail as well as the evaluation of entropy and the specific heat of a physical system when undergoing a structural transition. It was found that lowering the temperature from higher temperature (above Curie temperature) the entropy decreases continuously, indicating a decreasing of number of accessible states in this specific thermal condition and structure rearrangement. The specific heat has showed to be discontinuously in and increase linearly with temperature.
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