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Static magnetic moments revealed by muon spin relaxation and thermodynamic measurements in the quantum spin ice Yb2Ti2O7
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Chang, Lieh-Jeng, Lees, Martin R., Watanabe, Isao, Hillier, Adrian D., Yasui, Yukio and Onoda, Shigeki (2014) Static magnetic moments revealed by muon spin relaxation and thermodynamic measurements in the quantum spin ice Yb2Ti2O7. Physical Review B (Condensed Matter and Materials Physics), Volume 89 (Number 18). doi:10.1103/PhysRevB.89.184416 ISSN 1098-0121.
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Official URL: http://dx.doi.org/10.1103/PhysRevB.89.184416
Abstract
We present muon spin relaxation (μSR) 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 TC 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 TC we observe a steep drop in the asymmetry of the zero-field μSR 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.
Item Type: | Journal Article | ||||||
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Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||||
Journal or Publication Title: | Physical Review B (Condensed Matter and Materials Physics) | ||||||
Publisher: | American Physical Society | ||||||
ISSN: | 1098-0121 | ||||||
Official Date: | 23 May 2014 | ||||||
Dates: |
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Volume: | Volume 89 | ||||||
Number: | Number 18 | ||||||
DOI: | 10.1103/PhysRevB.89.184416 | ||||||
Status: | Peer Reviewed | ||||||
Publication Status: | Published | ||||||
Access rights to Published version: | Restricted or Subscription Access |
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