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

93Nb- and 27Al-NMR/NQR studies of the praseodymium based PrNb2Al20
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镨基 PrNb2Al20 的 93Nb- 和 27Al-NMR/NQR 研究

DOI:
10.1088/1742-6596/592/1/012093
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发表时间:
2015
期刊:
Journal of Physics: Conference Series
影响因子:
--
通讯作者:
and Hideyuki Sato
and Hideyuki Sato
中科院分区:
--
文献类型:
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作者:
Tetsuro Kubo;Hisashi Kotegawa;Hideki Tou;Ryuji Higashinaka;Akihiro Nakama;Yuji Aoki;and Hideyuki Sato

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用93 Nb和27 Al核磁共振(NMR)和核四极共振(NQR)研究了镨基化合物PrNb 2Al 20。在约3 T和30 K下观察到的NMR谱线显示了一个Nb信号和至少两个Al信号的典型粉末图案的叠加。93 Nb-NMR谱线可以通过使用先前报道的NQR频率ν Q = 1.8 MHz和不对称参数η ω 0来再现[Kubo T等人,2014 JPS Conf.Proc.3 012031]。由~(27)Al-NMR/NQR得到A位的NQR参数为ν Q,A = 1.53 MHz,η A = 0.20; B位的NQR参数为ν Q,B = 2.28 MHz,η B = 0.17。通过将该结果与之前的PrT 2 Al 20(T= Ti,V)的27 Al-NMR研究[Tokunaga Y et al 2013 Phys. Rev. B 88 085124]进行比较,这两个Al位点被分配给三个晶体学上不等价的Al位点中的两个。
We report a study of 93 Nb-and 27 Al-nuclear magnetic resonance (NMR) and nuclear quadrupole resonance (NQR) in a praseodymium based compound PrNb 2 Al 20. 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. 93 Nb-NMR line could be reproduced by using the previously reported NQR frequency ν Q≊ 1.8 MHz and asymmetry parameter η≊ 0 [Kubo T et al 2014 JPS Conf. Proc. 3 012031]. From 27 Al-NMR/NQR, NQR parameters are obtained to be ν Q, A≊ 1.53 MHz, and η A≊ 0.20 for the site A, and ν Q, B≊ 2.28 MHz, and η B≊ 0.17 for the site B. By comparing this result with the previous 27 Al-NMR study of PrT 2 Al 20 (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.