反对称交换作用 Antisymmetric exchange(Dzyaloshinskii–Moriya interaction)

In Physics, antisymmetric exchange, also known as the Dzyaloshinskii–Moriya interaction (DMI), is a contribution to the total magnetic exchange interaction between two neighboring magnetic spins.

In magnetically ordered systems, it favors a spin canting of otherwise parallel or antiparallel aligned magnetic moments and thus, is a source of weak ferromagnetic behavior in an antiferromagnet. The interaction is fundamental to the production of magnetic skyrmions and explains the magnetoelectric effects in a class of materials termed multiferroics.

参考资料:

https://en.wikipedia.org/wiki/Antisymmetric_exchange

https://zh.wikipedia.org/wiki/反对称交换作用