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Magnetic and quadrupolar order in a one-dimensional ferromagnet with cubic crystal-field anisotropy

M. Dudzinski·G. Fath·J. Sznajd
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Abstract

The zero temperature phase diagram of a one-dimensional S=2 Heisenberg ferromagnet with single-ion cubic anisotropy is studied numerically using the density-matrix renormalization group method. Evidence is found that although the model does not involve quadrupolar couplings, there is a purely quadrupolar phase for large values of the anisotropy. The phase transition between the magnetic and quadrupolar phases is continuous and it seems to be characterized by Ising critical exponents.

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M. Dudzinski, G. Fath, J. Sznajd. 1999-04-08. Magnetic and quadrupolar order in a one-dimensional ferromagnet with cubic crystal-field anisotropy. https://doi.org/10.1103/physrevb.59.13764

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