75 As NQR and NMR studies on the superconducting state of Ca10Pt4As8 (Fe1-xPt xAs)10

Yoshiaki Kobayashi; Takefumi Iida; Kazunori Suzuki; Takayuki Kawamata; Masayuki Itoh; Masatoshi Sato

doi:10.7566/JPSJ.83.014712

⁷⁵ As NQR and NMR studies on the superconducting state of Ca₁₀Pt₄As₈ (Fe_1-xPt _xAs)₁₀

Yoshiaki Kobayashi, Takefumi Iida, Kazunori Suzuki, Takayuki Kawamata, Masayuki Itoh, Masatoshi Sato

ENG - Applied Physics

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

4 Citations (Scopus)

Abstract

⁷⁵ As NQR and NMR measurements of Ca₁₀Pt ₄As₈ (Fe_1-xPt_xAs)₁₀ with the superconducting transition temperature T_c = 33.4K have been carried out. The observed ⁷⁵As NQR spectra can be divided into those from As sites in (Fe_1-xPt_x)As and PtAs₂ layers. From the NQR spectra of ⁷⁵As in the (Fe_1-xPt _xAs) layers, x is found to be ∼20%, indicating that the superconductivity is robust against nonmagnetic impurities. This contradicts the existence of the sign reversal of the order parameter in the system. The ⁷⁵As nuclear spin-lattice relaxation rates 1/T1's from the (Fe _1-xPt_x)As and PtAs₂ layers indicate that the PtAs₂ layers are in a nonmetallic state and do not contribute to the occurrence of the superconductivity.

Original language	English
Article number	014712
Journal	journal of the physical society of japan
Volume	83
Issue number	1
DOIs	https://doi.org/10.7566/JPSJ.83.014712
Publication status	Published - 2014 Jan 15

ASJC Scopus subject areas

Physics and Astronomy(all)

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abstract = "75 As NQR and NMR measurements of Ca10Pt 4As8 (Fe1-xPtxAs)10 with the superconducting transition temperature Tc = 33.4K have been carried out. The observed 75As NQR spectra can be divided into those from As sites in (Fe1-xPtx)As and PtAs2 layers. From the NQR spectra of 75As in the (Fe1-xPt xAs) layers, x is found to be ∼20%, indicating that the superconductivity is robust against nonmagnetic impurities. This contradicts the existence of the sign reversal of the order parameter in the system. The 75As nuclear spin-lattice relaxation rates 1/T1's from the (Fe 1-xPtx)As and PtAs2 layers indicate that the PtAs2 layers are in a nonmetallic state and do not contribute to the occurrence of the superconductivity.",

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AU - Kobayashi, Yoshiaki

AU - Iida, Takefumi

AU - Suzuki, Kazunori

AU - Kawamata, Takayuki

AU - Itoh, Masayuki

AU - Sato, Masatoshi

PY - 2014/1/15

Y1 - 2014/1/15

N2 - 75 As NQR and NMR measurements of Ca10Pt 4As8 (Fe1-xPtxAs)10 with the superconducting transition temperature Tc = 33.4K have been carried out. The observed 75As NQR spectra can be divided into those from As sites in (Fe1-xPtx)As and PtAs2 layers. From the NQR spectra of 75As in the (Fe1-xPt xAs) layers, x is found to be ∼20%, indicating that the superconductivity is robust against nonmagnetic impurities. This contradicts the existence of the sign reversal of the order parameter in the system. The 75As nuclear spin-lattice relaxation rates 1/T1's from the (Fe 1-xPtx)As and PtAs2 layers indicate that the PtAs2 layers are in a nonmetallic state and do not contribute to the occurrence of the superconductivity.

AB - 75 As NQR and NMR measurements of Ca10Pt 4As8 (Fe1-xPtxAs)10 with the superconducting transition temperature Tc = 33.4K have been carried out. The observed 75As NQR spectra can be divided into those from As sites in (Fe1-xPtx)As and PtAs2 layers. From the NQR spectra of 75As in the (Fe1-xPt xAs) layers, x is found to be ∼20%, indicating that the superconductivity is robust against nonmagnetic impurities. This contradicts the existence of the sign reversal of the order parameter in the system. The 75As nuclear spin-lattice relaxation rates 1/T1's from the (Fe 1-xPtx)As and PtAs2 layers indicate that the PtAs2 layers are in a nonmetallic state and do not contribute to the occurrence of the superconductivity.

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⁷⁵ As NQR and NMR studies on the superconducting state of Ca₁₀Pt₄As₈ (Fe_1-xPt _xAs)₁₀

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