NMR study of black-phase in SmS

International Conference on Strongly Correlated Electron Systems 2014

Koyama, T.^1 ; Yamada, H.^1 ; Ueda, K.^1 ; Mito, T.^1 ; Haga, Y.^2

Graduate School of Material Science, University of Hyogo, Kamigori, Hyogo

678-1297, Japan^1

Advanced Science Research Center, Japan Atomic Energy Agency, Ibaraki-Tokai

319-1195, Japan^2

关键词: Ambient pressures;    Constant magnetic fields;    Lower frequencies;    NMR measurements;    Non-magnetic semiconductors;    Nuclear Magnetic Resonance (NMR);    Nuclear spin lattice relaxation rate;    Temperature dependent;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/592/1/012027/pdf
DOI  :  10.1088/1742-6596/592/1/012027

来源: IOP

【 摘 要 】

We report the result of the33S nuclear magnetic resonance (NMR) measurement on the nonmagnetic semiconductor SmS at ambient pressure. For this measurement, the33S isotope enriched powder sample of SmS was prepared to increase the33S NMR intensity. We have attempted33S NMR measurement on SmS and successfully observed the signal of it. With decreasing temperature, the spectrum measured at the constant magnetic field shifted to lower frequency and became weakly temperature dependent below 50 K. The presence of the energy gap was microscopically established by the rapid decrease in the nuclear spin-lattice relaxation rate 1/T1. The activation energy was deduced to be 625 K from an Arrhenius plot of T1.