Fluctuations and instabilities of ferromagnetic domain-wall pairs in an external magnetic field
Fluctuations and instabilities of ferromagnetic domain-wall pairs in an external magnetic field
A classical continuum model of an effectively one-dimensional ferromagnet will exchange and anisotropies of hard and easy-axis type is considered. In the presence of an external magnetic field along the easy axis, the lowest-lying topological excitations are shown to be untwisted or twisted pairs of \ensuremath{\pi}-domain walls. The fluctuations around …