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

doi:10.1088/1742-6596/391/1/012130

Nuclear spin-lattice relaxation rate in the superconducting state on La(Fe_1-xZn_x)AsO_0.85 studied by ⁷⁵As-NMR

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

School of Science

Research output: Contribution to journal › Conference article › peer-review

Abstract

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 T^2.4±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 language	English
Article number	012130
Journal	Journal of Physics: Conference Series
Volume	391
Issue number	1
DOIs	https://doi.org/10.1088/1742-6596/391/1/012130
Publication status	Published - 2012
Event	International Conference on Strongly Correlated Electron Systems, SCES 2011 - Cambridge, United Kingdom Duration: Aug 29 2011 → Sept 3 2011

ASJC Scopus subject areas

Physics and Astronomy(all)

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10.1088/1742-6596/391/1/012130

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@article{edf3450a325647139d28930df8c089a6,

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

abstract = "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.",

author = "S. Kitagawa and Y. Nakai and T. Iye and K. Ishida and Guo, {Y. F.} and Shi, {Y. G.} and K. Yamaura and E. Takayama-Muromachi",

year = "2012",

doi = "10.1088/1742-6596/391/1/012130",

language = "English",

volume = "391",

journal = "Journal of Physics: Conference Series",

issn = "1742-6588",

publisher = "IOP Publishing Ltd.",

number = "1",

note = "International Conference on Strongly Correlated Electron Systems, SCES 2011 ; Conference date: 29-08-2011 Through 03-09-2011",

}

TY - JOUR

T1 - Nuclear spin-lattice relaxation rate in the superconducting state on La(Fe1-xZnx)AsO0.85 studied by 75As-NMR

AU - Kitagawa, S.

AU - Nakai, Y.

AU - Iye, T.

AU - Ishida, K.

AU - Guo, Y. F.

AU - Shi, Y. G.

AU - Yamaura, K.

AU - Takayama-Muromachi, E.

PY - 2012

Y1 - 2012

N2 - 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.

AB - 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.

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U2 - 10.1088/1742-6596/391/1/012130

DO - 10.1088/1742-6596/391/1/012130

M3 - Conference article

AN - SCOPUS:84874927759

SN - 1742-6588

VL - 391

JO - Journal of Physics: Conference Series

JF - Journal of Physics: Conference Series

IS - 1

M1 - 012130

T2 - International Conference on Strongly Correlated Electron Systems, SCES 2011

Y2 - 29 August 2011 through 3 September 2011

ER -

Nuclear spin-lattice relaxation rate in the superconducting state on La(Fe_1-xZn_x)AsO_0.85 studied by ⁷⁵As-NMR

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