Dynamic Spin Ice: Pr2Sn2O7

被引：96

作者：

Zhou, H. D. ^{[1
,2
]}

Wiebe, C. R. ^{[1
,2
]}

Janik, J. A. ^{[1
,2
]}

Balicas, L. ^{[2
]}

Yo, Y. J. ^{[2
]}

Qiu, Y. ^{[3
,4
]}

Copley, J. R. D. ^{[3
]}

Gardner, J. S. ^{[3
,5
]}

机构：

[1] Florida State Univ, Dept Phys, Tallahassee, FL 32306 USA

[2] Florida State Univ, Natl High Magnet Field Lab, Tallahassee, FL 32306 USA

[3] NIST, Ctr Neutron Res, Gaithersburg, MD 20899 USA

[4] Univ Maryland, Dept Mat Sci & Engn, College Pk, MD 20742 USA

[5] Indiana Univ, Bloomington, IN 47408 USA

来源：

PHYSICAL REVIEW LETTERS | 2008年 / 101卷 / 22期

关键词：

D O I：

10.1103/PhysRevLett.101.227204

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

In this Letter, we report a new spin ice-Pr(2)Sn(2)O(7)-which appears to have enhanced residual entropy due to the dynamic nature of the spins. Neutron scattering experiments show that at 200 mK, there is a significant amount of magnetic diffuse scattering which can be fit to the dipolar spin-ice model. However, these short-ranged ordered spins have a quasielastic response that is atypical of the canonical spin ices, and suggests that the ground state is dynamic (i.e., composed of locally ordered two-in-two-out spin configurations that can tunnel between energetically equivalent orientations). We report this as an example of a dynamic spin ice down to 200 mK.

引用

页数：4

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