Condensed Matter Physics - Ferromagnetism : Weiss (Classical) Theory of Ferromagnetism

Описание к видео Condensed Matter Physics - Ferromagnetism : Weiss (Classical) Theory of Ferromagnetism

The transition metals Fe,Co and Ni exhibit magnetization even when the magnetizing field is removed. This phenomenon is called Ferromagnetism. The ferromagnetic substances thus possess a magnetic moment even in the absence of external magnetic field. This magnetization is called spontaneous magnetization and it is stable only below a critical temperature,called Curie temperature. In order to account for the special properties of ferromagnetics, Weiss proposed a molecular field theory. He postulated the existence of an internal molecular field which favors spontaneous magnetization of a ferromagnetic material and is proportional to the magnetization of the material.

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