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

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

1999-04-08

arxiv.org/abs/cond-mat/9904109v1

Physics

Condensed Matter

11 pages, 7 figures, REVTeX, accepted in Phys. Rev. B (scheduled on June 99)

Scientific paper

10.1103/PhysRevB.59.13764

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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