Static magnetic moments revealed by muon spin relaxation and thermodynamic measurements in quantum spin ice Yb2Ti2O7
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 R2 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.
Turn this paper into a lesson
ArcXiv compiles a structured reading guide from this paper's metadata: plain-English importance, contributions, prerequisite concepts, which sections to read first, flashcards, and a quiz. Grounded in the abstract, never invented.