75As NMR studies of superconducting Ba0.72K 0.28Fe2As2

Z. Li; K. Matano; D. L. Sun; G. L. Sun; C. T. Lin; M. Ichioka; G. Q. Zheng

doi:10.1016/j.physc.2009.11.174

⁷⁵As NMR studies of superconducting Ba_0.72K _0.28Fe₂As₂

Z. Li, K. Matano, D. L. Sun, G. L. Sun, C. T. Lin, M. Ichioka, G. Q. Zheng

Research output: Contribution to journal › Article › peer-review

Abstract

We have performed ⁷⁵As nuclear magnetic resonance measurements on a single crystal of the hole-doped superconductor Ba_0.72K _0.28Fe₂As₂ (T_c = 31.5 K). The spin-lattice relaxation rate 1/T₁ decreases below T_c with no coherence peak and shows a step-wise variation at low temperatures, which is indicative of multiple superconducting gaps. In the normal state, we find that Fe antiferromagnetic spin fluctuations are anisotropic.

Original language	English
Pages (from-to)	S495-S496
Journal	Physica C: Superconductivity and its applications
Volume	470
Issue number	SUPPL.1
DOIs	https://doi.org/10.1016/j.physc.2009.11.174
Publication status	Published - Dec 2010

Keywords

Anisotropic spin fluctuations
BaK FeAs
NMR
Superconductivity

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Energy Engineering and Power Technology
Electrical and Electronic Engineering

Access to Document

10.1016/j.physc.2009.11.174

Cite this

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title = "75As NMR studies of superconducting Ba0.72K 0.28Fe2As2",

abstract = "We have performed 75As nuclear magnetic resonance measurements on a single crystal of the hole-doped superconductor Ba0.72K 0.28Fe2As2 (Tc = 31.5 K). The spin-lattice relaxation rate 1/T1 decreases below Tc with no coherence peak and shows a step-wise variation at low temperatures, which is indicative of multiple superconducting gaps. In the normal state, we find that Fe antiferromagnetic spin fluctuations are anisotropic.",

keywords = "Anisotropic spin fluctuations, BaK FeAs, NMR, Superconductivity",

author = "Z. Li and K. Matano and Sun, {D. L.} and Sun, {G. L.} and Lin, {C. T.} and M. Ichioka and Zheng, {G. Q.}",

year = "2010",

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language = "English",

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T1 - 75As NMR studies of superconducting Ba0.72K 0.28Fe2As2

AU - Li, Z.

AU - Matano, K.

AU - Sun, D. L.

AU - Sun, G. L.

AU - Lin, C. T.

AU - Ichioka, M.

AU - Zheng, G. Q.

PY - 2010/12

Y1 - 2010/12

N2 - We have performed 75As nuclear magnetic resonance measurements on a single crystal of the hole-doped superconductor Ba0.72K 0.28Fe2As2 (Tc = 31.5 K). The spin-lattice relaxation rate 1/T1 decreases below Tc with no coherence peak and shows a step-wise variation at low temperatures, which is indicative of multiple superconducting gaps. In the normal state, we find that Fe antiferromagnetic spin fluctuations are anisotropic.

AB - We have performed 75As nuclear magnetic resonance measurements on a single crystal of the hole-doped superconductor Ba0.72K 0.28Fe2As2 (Tc = 31.5 K). The spin-lattice relaxation rate 1/T1 decreases below Tc with no coherence peak and shows a step-wise variation at low temperatures, which is indicative of multiple superconducting gaps. In the normal state, we find that Fe antiferromagnetic spin fluctuations are anisotropic.

KW - Anisotropic spin fluctuations

KW - BaK FeAs

KW - NMR

KW - Superconductivity

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