Static magnetic moments revealed by muon spin relaxation and thermodynamic measurements in the quantum spin ice Yb2 Ti2 O7

Lieh Jeng Chang, Martin R. Lees, Isao Watanabe, Adrian D. Hillier, Yukio Yasui, Shigeki Onoda

Research output: Contribution to journalArticle

34 Citations (Scopus)

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 Rln2 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.

Original languageEnglish
Article number184416
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume89
Issue number18
DOIs
Publication statusPublished - 2014 May 23

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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