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Phenomenological Magnetic Model in Tsai-Type Approximants

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arxiv 1601.05905 v1 pith:PIFCYDDC submitted 2016-01-22 cond-mat.str-el

Phenomenological Magnetic Model in Tsai-Type Approximants

classification cond-mat.str-el
keywords magneticmodelapproximantsphenomenologicalstructuretsai-typeaperiodicityapproximately-regular
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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Motivated by recent discovery of canted ferromagnetism in Tsai-type approximants Au-Si-RE (RE = Tb, Dy, Ho), we propose a phenomenological magnetic model reproducing their magnetic structure and thermodynamic quantities. In the model, cubic symmetry ($m\bar{3}$) of the approximately-regular icosahedra plays a key role in the peculiar magnetic structure determined by a neutron diffraction experiment. Our magnetic model does not only explain magnetic behaviors in the quasicrystal approximants, but also provides a good starting point for the possibility of coexistence between magnetic long-range order and aperiodicity in quasicrystals.

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