Thermodynamically stable magnetic vortex states in magnetic crystals
Abstract
Magnetic vortices can be stabilized in magnetic materials by a socalled Dzyaloshinsky interaction. Their structure is calculated systematically for uniaxial ferromagnetic materials of the easyaxis type by numerically solving the differential equations in the circular cell approximation. In reduced units two external parameters are left over: the value of an external field parallel to the crystal axis and the relative strength of the Dzyaloshinsky interaction. A phase diagram in these variables consists of three thermodynamically stable phases: a uniform state at high field values, a onedimensionally modulated spiral state at low fields and the new vortex state in an intermediate field range. The corresponding calculated magnetization curves clearly show the transitions between these states.
 Publication:

Journal of Magnetism and Magnetic Materials
 Pub Date:
 December 1994
 DOI:
 10.1016/03048853(94)900469
 Bibcode:
 1994JMMM..138..255B