-What is the difference between B and H?
-Where does the magnetic moment of an atom come from? Why does it only occur in atoms with unfilled shells?
-What does Pauli's exclusion principle tell you about how electrons will fill available states?
-What does the desire to minimize electrostatic interaction energy tell you about how electrons will fill available states?
-What is required of the spins of material with a negative exchange integral if the exchange energy is minimized?
-What is required of the spins of material with a positive exchange integral if the exchange energy is minimized?
-Name three elements that have positive exchange integrals.
-Describe what the saturation magnetization is.
-What is a magnetic domain?
-What is the driving force to to form multiple magnetic domains?
-What limits (stops) the formation of domains?
-What is the difference between the easy and hard directions?
-Why does a domain wall exist over many atoms?
-What is magnetostriction?
-What sort of things hinder domain wall motion?
-What is the remnant magnetization?
-What is the coercive field?
-What is the difference between an intial magnetization curve and a hysteresis loop?
-Describe how to demagnetize a sample?
-Why can't you just demagnetize a sample by applying HC?
Important terms you should know
-exchange interaction
-magnetic domain
-magnetostatic energy
-domain wall, Bloch wall
-hard direction, easy direction
-coercive field
-hysteresis loop
-remanent magnetization
-demagnetization