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

We report the results of Al-27- and Nb-93- nuclear magnetic resonance (NMR) and nuclear quadrupole resonance (NQR) measurements in PrNb2Al20 single crystals. The field angle dependence of the observed Nb-93-NMR lines for the single crystal at around 5 T and at 50 K is reproduced by a simulation using previously reported NQR parameters nu(Q,Nb) approximate to 1.82 MHz and eta(Nb) 0, while Al-27-NMR lines were not reproduce by the previously reported NQR parameters nu(Q,Al(3)) approximate to 1.53 MHz and eta(Al(3)) approximate to 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 nu(Q,Al(3)) new approximate to 1 MHz and eta(Al(3),new) approximate to 0.4.