Abstract
We report the results of 27Al- and 93Nb- nuclear magnetic resonance (NMR) and nuclear quadrupole resonance (NQR) measurements in PrNb2Al20 single crystals. The field angle dependence of the observed 93Nb-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, while 27Al-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.
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