A model first developed to describe this phenomenon predicts that the fraction of low energy states equals the negative hyperbolic tangent of beta times the splitting energy.
A model first developed to describe this phenomenon predicts that the fraction of low energy states equals the negative hyperbolic tangent of beta times the splitting energy. This phenomenon only occurs if the density of states at the Fermi level times the Stoner exchange parameter is greater than one. Heisenberg modified a model of this phenomenon that simply defines points in a lattice to be spin-up or spin-down. A graph of this phenomenon has intercepts labelled coercivity and remanence and forms a (*) hysteresis loop with steps for gaussing and degaussing. Below the Curie temperature, this phenomenon occurs when domains align in the absence of an external field. For 10 points, name this form of permanent magnetism observed in cobalt, nickel, and iron.
A model first developed to describe this phenomenon predicts that the fraction of low energy states equals the negative hyperbolic tangent of beta times the splitting energy.
 ferromagnetism  [or word forms; prompt on  magnetism ]