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arXiv · 1206.4521

Vibrating-coil magnetometry of the spin liquid properties of Tb2Ti2O7

S. Legl·C. Krey·S. R. Dunsiger·H. A. Dabkowska·J. A. Rodriguez·G. M. Luke·C. Pfleiderer
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Abstract

We have explored the spin liquid state in Tb2Ti2O7 with vibrating coil magnetometry down to 0.04 K under magnetic fields up to 5 T. We observe magnetic history dependence below $T < 0.2$K reminiscent of the classical spin ice systems Ho2Ti2O7 and Dy2Ti2O7. The magnetic phase diagram inferred from the magnetization is essentially isotropic, without evidence of magnetization plateaux as anticipated for so-called quantum spin ice, predicted theoretically for [111] when quantum fluctuations renormalize the interactions. Instead, the magnetization for $T \ll T*$ agrees semi-quantitatively with the predictions of "all-in/all-out" (AIAO) antiferromagnetism. Taken together this suggests that the spin liquid state in Tb2Ti2O7 is akin to an incipient AIAO-antiferromagnet.

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S. Legl, C. Krey, S. R. Dunsiger, H. A. Dabkowska, J. A. Rodriguez, G. M. Luke, C. Pfleiderer. 2012-06-20. Vibrating-coil magnetometry of the spin liquid properties of Tb2Ti2O7. https://doi.org/10.1103/physrevlett.109.047201

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