期刊
PHYSICAL REVIEW B
卷 89, 期 18, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.89.184416
关键词
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资金
- National Science Council, Taiwan [NSC 101-2112-M-006-010-MY3]
- Japan Society of the Promotion of Science [24740253]
- EPSRC, UnitedKingdom [EP/I007210/1]
- Royal Society, United Kingdom
- International Exchanges Scheme [IE110911]
- Advantage West Midlands (AWM)
- European Regional Development Fund (ERDF)
- EPSRC [EP/I007210/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/I007210/1] Funding Source: researchfish
- Grants-in-Aid for Scientific Research [24740253] Funding Source: KAKEN
We present muon spin relaxation (mu SR) and specific-heat versus temperature C(T) measurements on polycrystalline and single-crystal samples of the pyrochlore magnet Yb2Ti2O7. C(T) exhibits a sharp peak at a T-C of 0.21 and 0.26 K for the single-crystal and polycrystalline samples, respectively. For both samples, the magnetic entropy released between 50 mK and 30 K amounts to R ln 2 per Yb. At temperatures below T-C we observe a steep drop in the asymmetry of the zero-field mu SR time spectra at short time scales, as well as a decoupling of the muon spins from the internal field in longitudinal magnetic fields of <= 0.25 T for both the polycrystalline and single-crystal samples. These muon data are indicative of static magnetic moments. Our results are consistent with the onset of long-range magnetic order in both forms of Yb2Ti2O7.
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