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Abstract
The influence of external magnetic field on the orientational structure of a ferronematic liquid crystal is analyzed. We use modified Rapini potential for the anisotropic part of coupling energy between the ferronematic and the limiting surfaces. We show that under magnetic field action one of three ferronematics phases is possible: the uniform state, the disturbed state and the saturation state. We find that the transition between these ferronematic phases can be either the first- or the second order transition depending on the surface anchoring anisotropy and segregation parameter. We show the influence of the segregation effect on the orientational transitions in ferronematics.
Acknowledgment
This work was supported by grant No. 10-02-96030 from Russian Foundation for Basic Research.
