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arXiv · 1606.07854

Spin glass state and enhanced spiral phase in doped delafossite oxide CuCrO2

Z. R. Yan·M. H. Qin·S. Dong·M. Zeng·X. B. Lu·X. S. Gao·J. M. Liu
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Abstract

In this work, we study the doping effects on the magnetic states of CuCrO2 based on the classical frustrated spin model [Lin et al., Phys. Rev. B 89, 220405(R) (2014)]. Several experimental observations can be well reproduced by the Monte Carlo simulations of the modified spin models. Our work suggests that the disorder induced by V/Al doping cooperated with the frustration in the system may contribute to the emergence of the spin glass state. Furthermore, the hole-doping by Mg2+ substituting Cr3+ enhances the quantum fluctuations and bond disorder which modulate the biquadratic exchanges, and in turn results in the promotion of the spiral phase, consistent with the experimental report.

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Z. R. Yan, M. H. Qin, S. Dong, M. Zeng, X. B. Lu, X. S. Gao, J. M. Liu. 2016-06-24. Spin glass state and enhanced spiral phase in doped delafossite oxide CuCrO2. https://doi.org/10.1103/physrevb.94.024410

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