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Physics · L5 · Phase Transitions and Critical Phenomena · flowchart

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by @openstemUpdated Physics
🧲 Free energy F(T, m)Expand in powers of m(only even powers allowed by m → −m symmetry)Quadratic term a₀(T − T_c) m²changes sign at T_cQuartic term b m⁴, b > 0(stabilizes F for large |m|)Minimize: ∂F/∂m = 0✨ T > T_c: m = 0T < T_c: m = ±√(a₀(T_c−T)/2b)

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