The Morin transition (also known as a spin-flop transition) is a magnetic phase transition in ñ-Fe<sub>2</sub>O<sub>3</sub> hematite where the antiferromagnetic ordering is reorganized from being aligned perpendicular to the c-axis to being aligned parallel to the c-axis below T<sub>M</sub>.
T<sub>M</sub> = 260 K for Fe<sup>3+</sup> in ñ-Fe<sub>2</sub>O<sub>3</sub>.
A change in magnetic properties takes place at the Morin transition temperature.
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