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; NQR relaxation ratesSakai, Hironori; Ronning, F.*; Hattori, Takanori; Tokunaga, Yo; Kambe, Shinsaku; Zhu, J.-X.*; Wakeham, N.*; Yasuoka, Hiroshi; Bauer, E. D.*; Thompson, J. D.*
Journal of Physics; Conference Series, 807(3), p.032001_1 - 032001_6, 2017/04
Times Cited Count：3 Percentile：68.31(Physics, Condensed Matter)We have used nuclear quadrupole resonance (NQR) to probe microscopically the response of a prototypical quantum critical metal CeCoIn to substitutions of small amounts of Cd for In. Approximately half of the Cd substituents induce local Ce moments in their close proximity, as observed by site-dependent longitudinal nuclear spin relaxation rates 
. To reaffirm that localized 
moments are induced around the Cd substituents, we find a Gaussian spin-echo decay rate 
of transverse nuclear spin relaxation. Further, 
for the NQR subpeak is found to be proportional to temperatures, again indicating local moments fluctuations around the Cd substituents, while that for the NQR main peak shows a 
-dependence. The latter temperature dependence is close to 0.75 in pure CeCoIn and indicates that the bulk electronic state is located close to a two dimensional quantum critical instability.
Sakai, Hironori; Hattori, Taisuke; Tokunaga, Yo; Kambe, Shinsaku; Ronning, F.*; Zhu, J.-X.*; Suzuki, Kohei*; Oshima, Yoshiki*; Yokoyama, Makoto*
no journal, ,
Dilute substitutions of non-magnetic dopants Zn can induce a long-ranged antiferromagnetic ordering to a heavy fermion superconductor CeCoIn. We have microscopically investigated the Zn-doped CeCoIn by means of the nuclear quadrupole/magnetic resonance (NQR/NMR) techniques.
Sakai, Hironori
no journal, ,
We have performed NMR/NQR experiments for slightly substituted CeCoIn by several substituents of Cd, Zn and Ni. In this presentation, the microscopic electronic states will be discussed.
