Vibrating-coil magnetometry of the spin liquid properties of Tb2Ti2O7.
Vibrating-coil magnetometry of the spin liquid properties of Tb2Ti2O7.
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DOI：
10.1103/physrevlett.109.047201
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发表时间：
2012-06
影响因子：
8.6
通讯作者：
S. Legl;C. Krey;S. Dunsiger;H. Da̧bkowska;J. Rodriguez;G. Luke;C. Pfleiderer
中科院分区：
文献类型：
--
作者：
S. Legl;C. Krey;S. Dunsiger;H. Da̧bkowska;J. Rodriguez;G. Luke;C. Pfleiderer
我们用振动线圈磁强计在低至~ 0.04K和高达5 T的磁场下研究了Tb（2）Ti（2）O（7）的自旋液态。在T ~*~0.2 K以下，我们观察到了经典自旋冰系统Ho（2）Ti（2）O（7）和Dy（2）TiTi（2）O（7）的磁历史依赖性。从磁化强度推断出的磁相图基本上是各向同性的，没有证据表明存在所谓的量子自旋冰所预期的磁化平台，理论上预测[111]当量子涨落使相互作用重正化时。相反，T T* 的磁化强度半定量地与“全进全出”（AIAO）反铁磁性的预测一致。综上所述，这表明Tb（2）Ti（2）O（7）中的自旋液态类似于初始的AIAO反铁磁体。
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.