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

doi:10.1143/jpsjs.81sb.sb003

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

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

7 Citations (Scopus)

Abstract

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 T_c. 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 T_c.

Original language	English
Article number	SB003
Journal	journal of the physical society of japan
Volume	81
Issue number	SUPPL.B
DOIs	https://doi.org/10.1143/jpsjs.81sb.sb003
Publication status	Published - Sept 2012
Externally published	Yes

All Science Journal Classification (ASJC) codes

Physics and Astronomy(all)

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Sakai, H., Chudo, H., Tokunaga, Y., Kambe, S., Haga, Y., Ronning, F., Bauer, E. D., Thompson, J. D., Homma, Y., Aoki, D., Nakano, Y., Honda, F., Settai, R., & Onuki, Y. (2012). Anisotropic spin fluctuations in the heavy fermion systems: Case studies of CePd₅Al₂ and NpPd₅Al₂. journal of the physical society of japan, 81(SUPPL.B), Article SB003. https://doi.org/10.1143/jpsjs.81sb.sb003

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title = "Anisotropic spin fluctuations in the heavy fermion systems: Case studies of CePd5Al2 and NpPd5Al2",

abstract = "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.",

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

year = "2012",

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doi = "10.1143/jpsjs.81sb.sb003",

language = "English",

volume = "81",

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T1 - Anisotropic spin fluctuations in the heavy fermion systems

T2 - Case studies of CePd5Al2 and NpPd5Al2

AU - Sakai, Hironori

AU - Chudo, Hiroyuki

AU - Tokunaga, Yo

AU - Kambe, Shinsaku

AU - Haga, Yoshinori

AU - Ronning, Filip

AU - Bauer, Eric D.

AU - Thompson, Joe D.

AU - Homma, Yoshiya

AU - Aoki, Dai

AU - Nakano, Yasunori

AU - Honda, Fuminori

AU - Settai, Rikio

AU - Onuki, Yoshichika

PY - 2012/9

Y1 - 2012/9

N2 - 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.

AB - 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.

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

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