Vibrating-coil magnetometry of the spin liquid properties of Tb 2Ti 2O 7

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 Tb 2Ti 2O 7 with vibrating-coil magnetometry down to ∼0.04K under magnetic fields up to 5 T. We observe magnetic history dependence below T *∼0.2K reminiscent of the classical spin ice systems Ho 2Ti 2O 7 and Dy 2Ti 2O 7. The magnetic phase diagram inferred from the magnetization is essentially isotropic, without evidence of magnetization plateaus as anticipated for so-called quantum spin ice, predicted theoretically for [111] when quantum fluctuations renormalize the interactions. Instead, the magnetization for T T * agrees semiquantitatively with the predictions of "all-in-all-out" (AIAO) antiferromagnetism. Taken together, this suggests that the spin liquid state in Tb 2Ti 2O 7 is akin to an incipient AIAO antiferromagnet.

Original languageEnglish
Article number047201
JournalPhysical Review Letters
Volume109
Issue number4
DOIs
StatePublished - 23 Jul 2012

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