Magnetism in material
Magnetism in material
Agenda today 1.Paramagnetism and dimagnetism 2.Magnetization and Magnetic susceptibility 3.Ferromagnetism 4.Displacement current
Agenda today 1. Paramagnetism and dimagnetism 2. Magnetization and Magnetic susceptibility 3. Ferromagnetism 4. Displacement current
Paramagnetism (顺磁性) Atom magnetic moment 2nr T V 1=9= qv T2 29 2
Paramagnetism (顺磁性） Atom magnetic moment + - pm
Magnetization and Magnetic Susceptibility (磁化强度与磁导率) In magnetic field,the direction of magnetic dipoles have the tendency to align to applied field M m Magnetization
Magnetization and Magnetic Susceptibility （磁化强度与磁导率） IO M B IS In magnetic field, the direction of magnetic dipoles have the tendency to align to applied field V p M m Magnetization
The result of magnetization is equivalent to a current on the surface of the material,called an amperian current(表面电流) Density ofAmperian current Amperian current per unit length △V J
The result of magnetization is equivalent to a current on the surface of the material, called an amperian current（表面电流） Density of Amperian current Is l M s m s j lS j lS V p M Amperian current per unit length