Magnetostatic Spin Waves
نویسندگان
چکیده
i.e., that the free currents flow in closed loops. Likewise, the time derivative of the fourth Maxwell equation implies that Jfree has no time dependence in magnetostatics. Often, magnetostatics is taken to be the situation in which ∇ · Jfree = 0 and D, E and Jfree have no time dependence, without explicit assumption that B and H also have no time dependence. Discuss the possibility of waves of B and H, consistent with the latter definition of magnetostatics [1]. Consider two specific examples of “magnetostatic” waves in which Jfree = 0:
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