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Millev, Y. T., Oepen, H.-P., Kirschner, J.

Phase boundaries of a uniaxial system in a applied field of arbitrary direction
Journal of Physics D 32, pp 2599-2604 (1999)
A procedure is put forward for the specificationof a suitable phase diagram for a uniaxial system with a higher-order anisotropy which undergoesa spin-reorientation transition via coherent rotation of magnetizationin an applied field of arbitrary strength and direction.The approach generalises recent studies for a field applied in one of the principal directions.The analysis is valid for bulk and thin-film systems and is relevant to all experimental techniques which involve the implementation of an external field. The representation is especially promising in the context of thickness-driven transitions in ultrathin systems. It is generally valid, beyond the uniaxial restriction, for any remagnetization process which takes place within a given plan

TH-1999-27