Spin canting
Appearance
![](https://upload.wikimedia.org/wikipedia/commons/thumb/1/1a/Dzyloshinskii_Moriya_antisymmetric_exchange.jpg/220px-Dzyloshinskii_Moriya_antisymmetric_exchange.jpg)
Someantiferromagneticmaterials exhibit a non-zeromagnetic momentat a temperature nearabsolute zero.This effect is ascribed tospin canting,a phenomenon through which spins are tilted by a small angle about their axis rather than being exactly co-parallel.
Spin canting is due to two factors contrasting each other:isotropic exchangewould align the spins exactly antiparallel, whileantisymmetric exchangearising from relativistic effects (spin–orbit coupling) would align the spins at 90° to each other. The net result is a small perturbation, the extent of which depends on the relative strength of these effects.[1]
This effect is observable in many materials such ashematite.[2]
References
[edit]- ^Richard Winpenny (2011).Molecular Cluster Magnets.World Scientific. p. 119.ISBN9789814322942.
- ^"Ferromagnetism".University of California, San Diego. Archived fromthe originalon 11 June 2016.Retrieved2 January2013.