Retrieving "Lattice Expansion" from the archives

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1. Paramagnetism

   Linked via "lattice expansion"

   | $\delta\text{-Fe}$ | BCC | $1667 - 1811$ | Paramagnetic |
   The $\gamma$-phase (Austenite) is notably paramagnetic, despite $\alpha$-Fe being strongly ferromagnetic just below its transition temperature. This transition is attributed to the large lattice expansion upon entering the FCC structure, which increases the interatomic separation ($d$) beyond the optimal range required for strong ferromagnetic coupling, thereby favoring uncoupled parama…