Weiss's Theory of Ferromagnetism - The Incredible Truth
Weiss’s Theory of Ferromagnetism
HYPOTHESIS:
- A specimen of ferromagnetic material contains a number of small regions called domains which are spontaneously magnetized. The magnitude of the spontaneous magnetization is given by the vector sum of the magnetic moments of individual domains.
- The spontaneous magnetization of each domain is due to the pressure of an exchange field, BE, which tends to produce a parallel alignment of the atomic dipoles.
BE
= λM
Where,
λ = Weiss field constant
BE
= Weiss field
M = Spontaneous magnetization
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