93Nb- and 27Al-NMR/NQR studies of the praseodymium based PrNb2Al20

International Conference on Strongly Correlated Electron Systems 2014

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;    Asymmetry parameter;    NQR frequencies;    Nuclear Magnetic Resonance (NMR);    Powder patterns;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/592/1/012093/pdf
DOI  :  10.1088/1742-6596/592/1/012093

来源: IOP

【 摘 要 】

We report a study of93Nb- and27Al-nuclear magnetic resonance (NMR) and nuclear quadrupole resonance (NQR) in a praseodymium based compound PrNb2Al20. The observed NMR line at around 3 T and 30 K shows a superposition of typical powder patterns of one Nb signal and at least two Al signals.93Nb-NMR line could be reproduced by using the previously reported NQR frequency νQ 1.8MHz and asymmetry parameter η0 [Kubo T et al 2014 JPS Conf. Proc. 3 012031]. From27Al-NMR/NQR, NQR parameters are obtained to be νQ,A 1.53 MHz, and ηA 0.20 for the site A, and νQ,B 2.28 MHz, and ηB 0.17 for the site B. By comparing this result with the previous27Al-NMR study of PrT2Al20(T = Ti, V) [Tokunaga Y et al 2013 Phys. Rev. B 88 085124], these two Al site are assigned to the two of three crystallographycally inequivalent Al sites.