##  [Landau Theory of Phase Transitions](/index.php/landau-theory-phase-transitions) 

  ##  [Landau Theory of Phase Transitions](https://natural.quantumdictionary.io/landau-theory-phase-transitions-0) 

  

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Definition

A phenomenological framework that characterizes continuous (second-order) phase transitions by introducing an order parameter whose small deviations enter a free-energy expansion in powers and gradients; symmetry and coefficient signs determine stable phases and critical behavior near the transition.