The Morin transition (also known as a spin-flip transition) is a magnetic
phase transition
In physics, chemistry, and other related fields like biology, a phase transition (or phase change) is the physical process of transition between one state of a medium and another. Commonly the term is used to refer to changes among the basic Sta ...
in α-Fe
2O
3 hematite
Hematite (), also spelled as haematite, is a common iron oxide compound with the formula, Fe2O3 and is widely found in rocks and soils. Hematite crystals belong to the rhombohedral lattice system which is designated the alpha polymorph of . ...
where the
antiferromagnetic
In materials that exhibit antiferromagnetism, the magnetic moments of atoms or molecules, usually related to the spins of electrons, align in a regular pattern with neighboring Spin (physics), spins (on different sublattices) pointing in oppos ...
ordering is reorganized from being aligned perpendicular to the c-axis to being aligned parallel to the c-axis below ''T''
M.
''T''
M = 260 K for Fe
3+ in α-Fe
2O
3.
A change in magnetic properties takes place at the Morin transition temperature.
See also
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References
* {{cite journal , last=Woods , first=G. T. , last2=Callcott , first2=T. A. , title=X-ray magnetic linear dichroism in α-Fe
2O
3 , journal=APS March Meeting Abstracts , url=https://ui.adsabs.harvard.edu/abs/2000APS..MARA24005W/abstract , access-date=2022-01-21 , page=, bibcode=2000APS..MARA24005W, date=2000
Magnetic ordering
Phase transitions