title: Vibrating-coil magnetometry of the spin liquid properties of Tb2Ti2O7.
abstract: We have explored the spin liquid state in Tb(2)Ti(2)O(7) 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 Ho(2)Ti(2)O(7) and Dy(2)TiTi(2)O(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(2)Ti(2)O(7) is akin to an incipient AIAO antiferromagnet.
authors.affiliation: Physik-Department E21, Technische Universität München, D-85748 Garching, Germany.
authors.forename: S
authors.initials: S
authors.lastname: Legl
authors.forename: C
authors.initials: C
authors.lastname: Krey
authors.forename: S R
authors.initials: SR
authors.lastname: Dunsiger
authors.forename: H A
authors.initials: HA
authors.lastname: Dabkowska
authors.forename: J A
authors.initials: JA
authors.lastname: Rodriguez
authors.forename: G M
authors.initials: GM
authors.lastname: Luke
authors.forename: C
authors.initials: C
authors.lastname: Pfleiderer