Nuclear spin-lattice relaxation rate in the superconducting state on La(Fe1-xZnx)AsO0.85 studied by 75As-NMR

S. Kitagawa, Y. Nakai, T. Iye, K. Ishida, Y. F. Guo, Y. G. Shi, K. Yamaura, E. Takayama-Muromachi

Research output: Contribution to journalConference articlepeer-review


75As nuclear spin-lattice relaxation rate 1/T1 was measured in Zn-free and Zn-substituted La(Fe1-xZnx)AsO0.85 (x 0, and 0.05), Tc of which is 25 K and 0 K, respectively. Although the temperature dependence of 1/T1T above Tc is the same between two samples, 1/T1T of x 0 shows T 3.0±0.1 dependence (1/T1 T4) in the superconducting (SC) state, but 1/T1T of non-SC x 0.05 sample continuously decreases below 50 K. The normalized 1/T1T [(1/T1T)x=0/(1/T1T)x=0.05], which is related to the SC gap structure, is proportional to T2.4±0.1 below Tc. These results indicate that the temperature dependence of 1/T1T in the SC state can be affected by the temperature dependence of the normal-state 1/T1T.

Original languageEnglish
Article number012130
JournalJournal of Physics: Conference Series
Issue number1
Publication statusPublished - 2012
EventInternational Conference on Strongly Correlated Electron Systems, SCES 2011 - Cambridge, United Kingdom
Duration: Aug 29 2011Sep 3 2011

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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