Direct evidence for a dynamical ground state in the highly frustrated Tb2Sn2O7 pyrochlore

被引：59

作者：

Bert, F.

Mendels, P.

Olariu, A.

Blanchard, N.

Collin, G.

Amato, A.

Baines, C.

Hillier, A. D.

机构：

[1] Univ Paris 11, Phys Solides Lab, UMR 8502, F-91405 Orsay, France

[2] CEA Saclay, DSM, Lab Leon Brillouin, F-91191 Gif Sur Yvette, France

[3] Paul Scherrer Inst, Lab Muon Spin Spect, CH-5232 Villigen, Switzerland

[4] Rutherford Appleton Lab, CLRC, ISIS Facil, Didcot OX11 0QX, Oxon, England

来源：

PHYSICAL REVIEW LETTERS | 2006年 / 97卷 / 11期

关键词：

D O I：

10.1103/PhysRevLett.97.117203

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

mu SR experiments have been performed on a powder sample of the "ordered spin ice" Tb2Sn2O7 pyrochlore. At base temperature (T=35 mK), the muon relaxation is found to be of dynamical nature, which demonstrates that strong fluctuations persist below the ferromagnetic transition (T-C=0.87 K). Hints of long-range ordering appear as oscillations of the muon polarization when an external field is applied and also as a hysteretic behavior below T-C. We propose that dynamics results from fluctuations of clusters of correlated spins with the ordered spin ice structure.

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页数：4

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