Abstract
Ordering properties of XY-like spin-glass magnets with an easy-plane magnetic anisotropyare studied based on a symmetry consideration and the results of recent numericalsimulations on the pure Heisenberg and XY spin-glass models. The effects of aneasy-plane-type uniaxial anisotropy, a random magnetic anisotropy and an appliedmagnetic field are investigated. In the XY regime in zero field, the ‘spin-chiralitydecoupling’ persists even under the random magnetic anisotropy, escaping the‘spin-chirality recoupling’ phenomenon which inevitably occurs in the Heisenberg regime.Contrast between the scalar chiral order and the vector chiral order is emphasized.Implications for experiments are discussed.
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