Magnetism and superconductivity in the new family of actinide compounds; AnPd$$_{5}$$Al$$_{2}$$
新しいアクチノイド化合物AnPd$$_{5}$$Al$$_{2}$$における磁性と超伝導
芳賀 芳範; 本間 佳哉*; 青木 大*; 池田 修悟*; 松田 達磨; 立岩 尚之; 山本 悦嗣; 中村 彰夫; 中島 健次; 荒井 康夫; 本多 史憲*; 摂待 力生*; 大貫 惇睦
Haga, Yoshinori; Homma, Yoshiya*; Aoki, Dai*; Ikeda, Shugo*; Matsuda, Tatsuma; Tateiwa, Naoyuki; Yamamoto, Etsuji; Nakamura, Akio; Nakajima, Kenji; Arai, Yasuo; Honda, Fuminori*; Settai, Rikio*; Onuki, Yoshichika
It is now well recognized that 5f electrons in actinide show a variety of intriguing physical properties such as heavy fermions, various magnetic and multipolar orderings and exotic superconductivity. Particularly, superconductivity in transuranium compounds are characterized by rather higher transition temperature compared to uranium- or rare-earth-based superconductor, as well as the existence of localized-like 5f paramagnetic moments following Curie-Weiss law. Among them, NpPd$$_{5}$$Al$$_{2}$$ is the first neptunium-based heavy fermion superconductor. Detailed investigations of the magnetic and thermal properties around the upper critical field have been performed. It is shown that the large anisotropic paramagnetic moment as well as electronic specific heat existing in the normal state vanish in the superconducting state, indicating a spin-singlet pairing.
使用言語 : English
掲載資料名 : IOP Conference Series; Materials Science and Engineering
: 9
:
ページ数 : p.012046_1 - 012046_7
発行年月 : 2010/05
出版社名 : IOP Publishing
発表会議名 : International Conference on Actinides 2009
開催年月 : 2009/07
開催都市 : San Francisco
開催国 : U. S. A.
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受委託・共同研究相手機関 : 東北大学
 
登録番号 : BB20083528
抄録集掲載番号 : 38001289
論文投稿番号 : 7926
Accesses  (From Jun. 2, 2014)
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