Global stability and the magnetic phase diagram of a geometrically frustrated triangular lattice antiferromagnet

Randy S. Fishman; Jason T. Haraldsen

doi:10.1063/1.3553780

Global stability and the magnetic phase diagram of a geometrically frustrated triangular lattice antiferromagnet

Randy S. Fishman, Jason T. Haraldsen

Materials Theory

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Abstract

While a magnetic phase may be both locally stable and globally unstable, global stability always implies local stability. The distinction between local and global stability is studied on a geometrically-frustrated triangular lattice antiferromagnet with single-ion anisotropy D that favors alignment along the z axis. Whereas the critical value D_c^loc for local stability may be discontinuous across a magnetic phase boundary, the critical value D_c^glo D_c^loc for global stability must be continuous. We demonstrate this behavior across the phase boundary between collinear three and four sublattice phases that are stable for large D.

Original language	English
Article number	07E117
Journal	Journal of Applied Physics
Volume	109
Issue number	7
DOIs	https://doi.org/10.1063/1.3553780
State	Published - Apr 1 2011

Funding

This research was sponsored by the Division of Materials Science and Engineering of the U.S. Department of Energy (R.F. and J.H.) and under the auspices of the National Nuclear Security Administration of the U.S. Department of Energy at Los Alamos National Laboratory (J.H.) under Contract No. DE-AC52-06NA25396

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Global stability and the magnetic phase diagram of a geometrically frustrated triangular lattice antiferromagnet

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