Anisotropic spin fluctuations in the heavy fermion systems: Case studies of CePd5Al2 and NpPd5Al2

Hironori Sakai, Hiroyuki Chudo, Yo Tokunaga, Shinsaku Kambe, Yoshinori Haga, Filip Ronning, Eric D. Bauer, Joe D. Thompson, Yoshiya Homma, Dai Aoki, Yasunori Nakano, Fuminori Honda, Rikio Settai, Yoshichika Onuki

研究成果: Contribution to journalArticle査読

5 被引用数 (Scopus)


In the so-called 115 family members with chemical formulae of CeTIn 5 (T=Co, Rh, Ir) and AnTGa5 (An=U, Np, Pu), our analysis of the Knight shift and spin-lattice relaxation rates suggests that larger XY-type anisotropy in the antiferromagnetic spin fluctuations in the normal states would favor dwave superconductivity with higher Tc. In order to examine this working hypothesis, the anisotropy ratios of antiferromagnetic fluctuations are derived from our NMR results for the superconductor NpPd 5Al2 and antiferromagnet CePd5Al2, which are tetragonal compounds with a 115-related structure. CePd 5Al2 shows Ising-type anisotropy, which is the same anisotropy as in the ordered state. On the other hand, NpPd5Al 2 shows XY-type anisotropy just above Tc.

ジャーナルjournal of the physical society of japan
出版ステータス出版済み - 9 2012

All Science Journal Classification (ASJC) codes

  • 物理学および天文学(全般)


「Anisotropic spin fluctuations in the heavy fermion systems: Case studies of CePd<sub>5</sub>Al<sub>2</sub> and NpPd<sub>5</sub>Al<sub>2</sub>」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。