期刊
PHYSICAL REVIEW LETTERS
卷 101, 期 22, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.101.227204
关键词
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资金
- NSF [DMR-0084173, DMR-0454672]
- EIEG program (FSU)
- state of Florida
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.
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