75As-NQR studies of filled-skutterudites PrRu4As 12 and LaRu4As12

Masahiro Shimizu; Hideaki Amanuma; Kenich Hachitani; Hideto Fukazawa; Yoh Kohori; Takahiro Namiki; Chihiro Sekine; Ichimin Shirotani

doi:10.1143/JPSJS.77SA.229

⁷⁵As-NQR studies of filled-skutterudites PrRu₄As ₁₂ and LaRu₄As₁₂

Masahiro Shimizu^*, Hideaki Amanuma, Kenich Hachitani, Hideto Fukazawa, Yoh Kohori, Takahiro Namiki, Chihiro Sekine, Ichimin Shirotani

^*Corresponding author for this work

Materials Design and Engineering

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

2 Scopus citations

Abstract

We report ⁷⁵As nuclear quadrupole resonance (NQR) measurements of the filled skutterudite superconductors LaRu₄As ₁₂ and PrRu₄As₁₂. The temperature dependence of ⁷⁵As-NQR line and the nuclear spin-lattice relaxation rate 1/T ₁ show that the Pr³⁺ has a crystal electric field (CEF) singlet ground state with a separate first excited state. In the superconducting state of PrRu₄As₁₂ and LaRu₄As₁₂, 1/T₁ has a coherence peak just below the transition temperature and decreases exponentially at low temperatures. This behavior shows that the s-wave superconductivity occurs in both compounds.

Original language	English
Pages (from-to)	229-231
Number of pages	3
Journal	Journal of the Physical Society of Japan
Volume	77
Issue number	SUPPL.A
DOIs	https://doi.org/10.1143/JPSJS.77SA.229
State	Published - 2008

Keywords

Filled skutterudites
Superconductivity

ASJC Scopus subject areas

General Physics and Astronomy

Access to Document

10.1143/JPSJS.77SA.229

Cite this

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title = "75As-NQR studies of filled-skutterudites PrRu4As 12 and LaRu4As12",

abstract = "We report 75As nuclear quadrupole resonance (NQR) measurements of the filled skutterudite superconductors LaRu4As 12 and PrRu4As12. The temperature dependence of 75As-NQR line and the nuclear spin-lattice relaxation rate 1/T 1 show that the Pr3+ has a crystal electric field (CEF) singlet ground state with a separate first excited state. In the superconducting state of PrRu4As12 and LaRu4As12, 1/T1 has a coherence peak just below the transition temperature and decreases exponentially at low temperatures. This behavior shows that the s-wave superconductivity occurs in both compounds.",

keywords = "Filled skutterudites, Superconductivity",

author = "Masahiro Shimizu and Hideaki Amanuma and Kenich Hachitani and Hideto Fukazawa and Yoh Kohori and Takahiro Namiki and Chihiro Sekine and Ichimin Shirotani",

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T1 - 75As-NQR studies of filled-skutterudites PrRu4As 12 and LaRu4As12

AU - Shimizu, Masahiro

AU - Amanuma, Hideaki

AU - Hachitani, Kenich

AU - Fukazawa, Hideto

AU - Kohori, Yoh

AU - Namiki, Takahiro

AU - Sekine, Chihiro

AU - Shirotani, Ichimin

PY - 2008

Y1 - 2008

N2 - We report 75As nuclear quadrupole resonance (NQR) measurements of the filled skutterudite superconductors LaRu4As 12 and PrRu4As12. The temperature dependence of 75As-NQR line and the nuclear spin-lattice relaxation rate 1/T 1 show that the Pr3+ has a crystal electric field (CEF) singlet ground state with a separate first excited state. In the superconducting state of PrRu4As12 and LaRu4As12, 1/T1 has a coherence peak just below the transition temperature and decreases exponentially at low temperatures. This behavior shows that the s-wave superconductivity occurs in both compounds.

AB - We report 75As nuclear quadrupole resonance (NQR) measurements of the filled skutterudite superconductors LaRu4As 12 and PrRu4As12. The temperature dependence of 75As-NQR line and the nuclear spin-lattice relaxation rate 1/T 1 show that the Pr3+ has a crystal electric field (CEF) singlet ground state with a separate first excited state. In the superconducting state of PrRu4As12 and LaRu4As12, 1/T1 has a coherence peak just below the transition temperature and decreases exponentially at low temperatures. This behavior shows that the s-wave superconductivity occurs in both compounds.

KW - Filled skutterudites

KW - Superconductivity

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M3 - 学術論文

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