Analysis of 27Al- and 93Nb-NMR spectra of PrNb2Al20 single crystal

TMU International Symposium on "New Quantum Phases Emerging from Novel Crystal Structure"

Kubo, Tetsuro^1 ; Kotegawa, Hisashi^1 ; Tou, Hideki^1 ; Higashinaka, Ryuji^2 ; Nakama, Akihiro^2 ; Aoki, Yuji^2 ; Sato, Hideyuki^2

Department of Physics, Graduate School of Science, Kobe University, 1-1 Rokkodai, Hyogo, Kobe

657-8501, Japan^1

Department of Physics, Graduate School of Science and Engineering, Tokyo Metropolitan University, 1-1 Minamiohsawa, Tokyo, Hachioji

192-0397, Japan^2

关键词: 27Al NMR;    Field angle;    NMR spectrum;    Nuclear Magnetic Resonance (NMR);    Nuclear quadrupole resonance measurements;    Powder samples;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/683/1/012015/pdf
DOI  :  10.1088/1742-6596/683/1/012015

来源: IOP

【 摘 要 】

We report the results of27Al- and93Nb- nuclear magnetic resonance (NMR) and nuclear quadrupole resonance (NQR) measurements in PrNb2Al20single crystals. The field angle dependence of the observed93Nb-NMR lines for the single crystal at around 5 T and at 50 K is reproduced by a simulation using previously reported NQR parameters νQ,Nb≈ 1.82 MHz and ηNb≈ 0, while27Al-NMR lines were not reproduce by the previously reported NQR parameters νQ,Al(3)≈ 1.53 MHz and ηAl(3)≈ 0.17. By reexamining and reconsidering the NMR and NQR lines for powder samples, we obtained a correct NQR parameters for Al(3) site to be νQ,Al(3),new≈ 1 MHz and ηAl(3),new≈ 0.4.