Nuclear spin-lattice relaxation rate in the superconducting state on La(Fe<sub>1−<i>x</i></sub>Zn<sub><i>x</i></sub>)AsO<sub>0.85</sub>studied by<sup>75</sup>As-NMR

DOI Open Access

Search this article

Description

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 T3.0±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.

Journal

Details 詳細情報について

Report a problem

Back to top