Magnetic Fields in Matter - Linear and Nonlinear Media - Ferromagnetism
3 important questions on Magnetic Fields in Matter - Linear and Nonlinear Media - Ferromagnetism
WHat do dipooles do in ferromagnetism?
Each dipole likes to point in the same directin as their neighbor. This allignment only hppens in relatively small patches called domaisn. The domains themselve are randomly oriented .
How to make a permanent magnet?
A piece of iron is put into a strong magnetic field and ten the toque tends to align the dipoles parallel to the fiel d. Clash of domains and the domain boundarie smove. Domains parallel to the field grow and the domains that are not will shrink. The iron will then be saturated.
What is teh Curie point?
The temperature in case of iron is that when it is below 770 it si ferromagnetic and above it is paramagnetic.
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