Article
Article
Helimagnetism
Article By:
Keffer, Frederic Department of Physics, University of Pittsburgh, Pittsburgh, Pennsylvania.
Last reviewed:August 2020
DOI:https://doi.org/10.1036/1097-8542.312100
A property possessed by some metals, alloys, and salts of transition elements in which the atomic magnetic moments, at sufficiently low temperatures, are arranged in a spiral or helix. It may be seen from the illustration that simple antiferromagnets and ferromagnets can be considered as nonconical helimagnets with helical angles ϕ of 180 and 0°, respectively. In the same way, nonconical helimagnets may be considered as conical helimagnets with cone angle θ of 0°. Some typical helimagnets are listed in the table. The magnetic structures have been detected by neutron diffraction.
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