期刊
PHYSICAL REVIEW LETTERS
卷 105, 期 10, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.105.107203
关键词
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资金
- NSERC
- CIFAR
- NSF at Columbia [DMR-05-02706, DMR-08-06846]
LiHoxY1-xF4 is an insulator where the magnetic Ho3+ ions have an Ising character and interact mainly through magnetic dipolar fields. We used the muon spin relaxation technique to study the nature of its ground state for samples with x <= 0.25. In contrast with some previous works, we did not find canonical spin glass behavior down to approximate to 15 mK. Instead, below approximate to 300 mK we observed temperature-independent dynamic magnetism characterized by a single correlation time. The 300 mK energy scale corresponds to the Ho3+ hyperfine interaction strength, suggesting that this interaction may be involved in the dynamic behavior of the system.
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