Field-Induced Spin-Ice-Like Orders in Spin Liquid Tb2Ti2O7

被引：30

作者：

Cao, H. ^{[1
]}

Gukasov, A. ^{[1
]}

Mirebeau, I. ^{[1
]}

Bonville, P. ^{[2
]}

Dhalenne, G. ^{[3
]}

机构：

[1] CE Saclay, CNRS, CEA, Leon Brillouin Lab, F-91191 Gif Sur Yvette, France

[2] CE Saclay, CNRS, CEA, Serv Phys Etat Condense, F-91191 Gif Sur Yvette, France

[3] Univ Paris 11, Lab Physicochim Etat Solide, F-91405 Orsay, France

来源：

PHYSICAL REVIEW LETTERS | 2008年 / 101卷 / 19期

关键词：

D O I：

10.1103/PhysRevLett.101.196402

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have studied the field-induced magnetic structures in Tb(2)Ti(2)O(7), in a wide temperature (0.3 < T < 270 K) and field (0 < H < 7 T) range, by single crystal polarized and unpolarized neutron diffraction, with H parallel to[110] axis. A ferromagneticlike structure with k=0 propagation vector is induced, whose local order at low field and low temperature is akin to spin ice. The four Tb ions separate in alpha and beta chains having different values of the magnetic moments, which is quantitatively explained by taking the crystal field anisotropy into account. Above 2 T and below 2 K, an antiferromagneticlike structure with k=(0,0,1) is induced besides the k=0 structure. It shows a reentrant behavior and extends over a finite length scale. It occurs together with a broadening of the nuclear peaks, which suggests a field-induced distortion and magnetostriction effect.

引用

页数：4

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