Muon location and muon dynamics in DyNi5

Article

关键词: RARE-EARTH;    GDNI5;    DIFFUSION;    CRYSTAL;    LOCALIZATION;    HYDRIDES;    UNI2AL3;    METALS;    ATOMS;   

DOI  :  10.1103/PhysRevB.67.014303

来源: SCIE

【 摘 要 】

In DyNi5, the muon localizes at the 6i (1/2,0,0.1) interstitial site and below similar to80 K a second muon site becomes populated, the metastable 6(ring) site. We determine the mean residence time of the muon in this ring site and analyze its temperature dependence with a multiphonon quantum diffusion process. The coincidence energy is measured to be E-a/k(B)=400 (20) K and the tunneling matrix element J=0.21 (7) meV. A comparison with GdNi5 gives insight in the muon potential well scheme in these compounds. We attribute the large diversity of muon sites in RNi5 series, where R is a rare earth element, to the relatively low density of states at the Fermi level.

【 授权许可】

Free