Ga NQR relaxation rates in superconductor PuRhGa5

H. Sakai; S. Kambe; Y. Tokunaga; T. Fujimoto; R. E. Walstedt; H. Yasuoka; D. Aoki; Y. Homma; E. Yamamoto; A. Nakamura; Y. Shiokawa; K. Nakajima; Y. Arai; T. D. Matsuda; Y. Haga; Y. Onuki

doi:10.1016/j.jpcs.2007.08.039

Ga NQR relaxation rates in superconductor PuRhGa₅

H. Sakai, S. Kambe, Y. Tokunaga, T. Fujimoto, R. E. Walstedt, H. Yasuoka, D. Aoki, Y. Homma, E. Yamamoto, A. Nakamura, Y. Shiokawa, K. Nakajima, Y. Arai, T. D. Matsuda, Y. Haga, Y. Onuki

Materials Processing and Characterization Division

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

1 Citation (Scopus)

Abstract

Nuclear quadupole resonance (NQR) measurements have been performed on the Pu-based superconductor PuRhGa₅ with a transition temperature of ∼ 8.8 K. NQR lines ascribed to ⁶⁹Ga (2), ⁷¹Ga (2), and ⁶⁹Ga (1) have been found in zero field. Spin-lattice relaxation rate (1 / T₁) data for these lines have been measured in the superconducting state. The temperature variation of 1 / T₁ can be interpreted in terms of a line-nodal superconducting gap. Data for both the ⁶⁹Ga (2) and ⁶⁹Ga (1) NQR lines show a constant-T₁ T behavior between T_c and T^* ∼ 30 K, which suggests that a coherent Fermi-liquid state sets in below T^*. The modified Korringa relation using 1 / T₁ and Knight shift data in an applied field indicates that the normal state of PuRhGa₅ can be regarded as an antiferromagnetically correlated metal.

Original language	English
Pages (from-to)	2103-2106
Number of pages	4
Journal	Journal of Physics and Chemistry of Solids
Volume	68
Issue number	11
DOIs	https://doi.org/10.1016/j.jpcs.2007.08.039
Publication status	Published - 2007 Nov

Keywords

A. Superconductor
D. NQR

ASJC Scopus subject areas

Chemistry(all)
Materials Science(all)
Condensed Matter Physics

Access to Document

10.1016/j.jpcs.2007.08.039

Cite this

@article{f66005e30692483e96680515ec28c95f,

title = "Ga NQR relaxation rates in superconductor PuRhGa5",

abstract = "Nuclear quadupole resonance (NQR) measurements have been performed on the Pu-based superconductor PuRhGa5 with a transition temperature of ∼ 8.8 K. NQR lines ascribed to 69Ga (2), 71Ga (2), and 69Ga (1) have been found in zero field. Spin-lattice relaxation rate (1 / T1) data for these lines have been measured in the superconducting state. The temperature variation of 1 / T1 can be interpreted in terms of a line-nodal superconducting gap. Data for both the 69Ga (2) and 69Ga (1) NQR lines show a constant-T1 T behavior between Tc and T* ∼ 30 K, which suggests that a coherent Fermi-liquid state sets in below T*. The modified Korringa relation using 1 / T1 and Knight shift data in an applied field indicates that the normal state of PuRhGa5 can be regarded as an antiferromagnetically correlated metal.",

keywords = "A. Superconductor, D. NQR",

author = "H. Sakai and S. Kambe and Y. Tokunaga and T. Fujimoto and Walstedt, {R. E.} and H. Yasuoka and D. Aoki and Y. Homma and E. Yamamoto and A. Nakamura and Y. Shiokawa and K. Nakajima and Y. Arai and Matsuda, {T. D.} and Y. Haga and Y. Onuki",

note = "Funding Information: The author (H.S.) was partially supported by the Ministry of Education, Culture, Sports and Science and Technology, Grant-in-Aid for Young Scientists (B), 18740217, 2006.",

year = "2007",

month = nov,

doi = "10.1016/j.jpcs.2007.08.039",

language = "English",

volume = "68",

pages = "2103--2106",

journal = "Journal of Physics and Chemistry of Solids",

issn = "0022-3697",

publisher = "Elsevier Limited",

number = "11",

}

TY - JOUR

T1 - Ga NQR relaxation rates in superconductor PuRhGa5

AU - Sakai, H.

AU - Kambe, S.

AU - Tokunaga, Y.

AU - Fujimoto, T.

AU - Walstedt, R. E.

AU - Yasuoka, H.

AU - Aoki, D.

AU - Homma, Y.

AU - Yamamoto, E.

AU - Nakamura, A.

AU - Shiokawa, Y.

AU - Nakajima, K.

AU - Arai, Y.

AU - Matsuda, T. D.

AU - Haga, Y.

AU - Onuki, Y.

N1 - Funding Information: The author (H.S.) was partially supported by the Ministry of Education, Culture, Sports and Science and Technology, Grant-in-Aid for Young Scientists (B), 18740217, 2006.

PY - 2007/11

Y1 - 2007/11

N2 - Nuclear quadupole resonance (NQR) measurements have been performed on the Pu-based superconductor PuRhGa5 with a transition temperature of ∼ 8.8 K. NQR lines ascribed to 69Ga (2), 71Ga (2), and 69Ga (1) have been found in zero field. Spin-lattice relaxation rate (1 / T1) data for these lines have been measured in the superconducting state. The temperature variation of 1 / T1 can be interpreted in terms of a line-nodal superconducting gap. Data for both the 69Ga (2) and 69Ga (1) NQR lines show a constant-T1 T behavior between Tc and T* ∼ 30 K, which suggests that a coherent Fermi-liquid state sets in below T*. The modified Korringa relation using 1 / T1 and Knight shift data in an applied field indicates that the normal state of PuRhGa5 can be regarded as an antiferromagnetically correlated metal.

AB - Nuclear quadupole resonance (NQR) measurements have been performed on the Pu-based superconductor PuRhGa5 with a transition temperature of ∼ 8.8 K. NQR lines ascribed to 69Ga (2), 71Ga (2), and 69Ga (1) have been found in zero field. Spin-lattice relaxation rate (1 / T1) data for these lines have been measured in the superconducting state. The temperature variation of 1 / T1 can be interpreted in terms of a line-nodal superconducting gap. Data for both the 69Ga (2) and 69Ga (1) NQR lines show a constant-T1 T behavior between Tc and T* ∼ 30 K, which suggests that a coherent Fermi-liquid state sets in below T*. The modified Korringa relation using 1 / T1 and Knight shift data in an applied field indicates that the normal state of PuRhGa5 can be regarded as an antiferromagnetically correlated metal.

KW - A. Superconductor

KW - D. NQR

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U2 - 10.1016/j.jpcs.2007.08.039

DO - 10.1016/j.jpcs.2007.08.039

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JO - Journal of Physics and Chemistry of Solids

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