73Ge NQR study of superconducting skutterudites MPt 4Ge12 (M = Sr, Ba)

Ko Ichi Magishi; Hitoshi Sugawara; Takahito Saito; Kuniyuki Koyama; Fumiya Kanetake; Hidekazu Mukuda; Yoshio Kitaoka; Kohei M. Itoh; Eugene E. Haller

doi:10.1143/JPSJS.80SA.SA028

⁷³Ge NQR study of superconducting skutterudites MPt ₄Ge₁₂ (M = Sr, Ba)

Ko Ichi Magishi, Hitoshi Sugawara, Takahito Saito, Kuniyuki Koyama, Fumiya Kanetake, Hidekazu Mukuda, Yoshio Kitaoka, Kohei M. Itoh, Eugene E. Haller

Department of Applied Physics and Physico-Informatics

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

Abstract

We report on the results of the ⁷³Ge-NQR measurements for MPt₄Ge₁₂ (M = Sr, Ba) to clarify the microscopic electronic states and the relationship between superconductivity and rattling. In the normal state, 1/T₁ is proportional to temperature, showing a Korringa relation 1/T₁T = 0.020 and 0.016 (sK)^-1 for SrPt₄Ge₁₂ and BaPt₄Ge₁₂, respectively. Also, in the superconducting state, 1/T₁ shows a distinct coherence peak just below T_C, which suggests a conventional BCS superconductor.

Original language	English
Article number	SA028
Journal	Journal of the Physical Society of Japan
Volume	80
Issue number	SUPPL. A
DOIs	https://doi.org/10.1143/JPSJS.80SA.SA028
Publication status	Published - 2011 Jul

Keywords

Filled skutterudite
NQR
Superconductivity

ASJC Scopus subject areas

Physics and Astronomy(all)

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⁷³Ge NQR study of superconducting skutterudites MPt ₄Ge₁₂ (M = Sr, Ba). / Magishi, Ko Ichi; Sugawara, Hitoshi; Saito, Takahito; Koyama, Kuniyuki; Kanetake, Fumiya; Mukuda, Hidekazu; Kitaoka, Yoshio; Itoh, Kohei M.; Haller, Eugene E.

In: Journal of the Physical Society of Japan, Vol. 80, No. SUPPL. A, SA028, 07.2011.

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

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abstract = "We report on the results of the 73Ge-NQR measurements for MPt4Ge12 (M = Sr, Ba) to clarify the microscopic electronic states and the relationship between superconductivity and rattling. In the normal state, 1/T1 is proportional to temperature, showing a Korringa relation 1/T1T = 0.020 and 0.016 (sK)-1 for SrPt4Ge12 and BaPt4Ge12, respectively. Also, in the superconducting state, 1/T1 shows a distinct coherence peak just below TC, which suggests a conventional BCS superconductor.",

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AU - Magishi, Ko Ichi

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AU - Saito, Takahito

AU - Koyama, Kuniyuki

AU - Kanetake, Fumiya

AU - Mukuda, Hidekazu

AU - Kitaoka, Yoshio

AU - Itoh, Kohei M.

AU - Haller, Eugene E.

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AB - We report on the results of the 73Ge-NQR measurements for MPt4Ge12 (M = Sr, Ba) to clarify the microscopic electronic states and the relationship between superconductivity and rattling. In the normal state, 1/T1 is proportional to temperature, showing a Korringa relation 1/T1T = 0.020 and 0.016 (sK)-1 for SrPt4Ge12 and BaPt4Ge12, respectively. Also, in the superconducting state, 1/T1 shows a distinct coherence peak just below TC, which suggests a conventional BCS superconductor.

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