NMR Study of the Magnetism and Superconductivity in Cu1+xCo2−xS4
作者： Yuji Furukawa , Shinji Wada , Kazuo Miyatani , Toshiro Tanaka , Manabu Fukugauchi
DOI: 10.1007/978-4-431-68535-7_34
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摘要: A correlation between the superconducting (SC) transition and antiferromagnetic (AF) spin fluctuations in a new SC copper thiospinel Cu1+xCo2−xS4 (x=0−0.5) was investigated microscopically by an NMR experiment at 75MHz range of T=4.2−200K. For x=0.5 (TN=19.0K, TC=2.3K), (T1T)−1 both 63Cu site 59Co B are significantly enhanced with lowering T below ~100K. While, for x=0 (TN=17.5K TC=0), enhancements strongly suppressed. This indicates that AF correlations grow sample (x=0.5) than non-SC (x=0).
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sci-hub.st 参考文章(4)
Shigeki Ohsugi, Yoshio Kitaoka, Kenji Ishida, Kunisuke Asayama, Cu NQR Study of the Spin Dynamics in High-T c Superconductor La 2-x Sr x CuO 4 Journal of the Physical Society of Japan. ,vol. 60, pp. 2351- 2360 ,(1991) , 10.1143/JPSJ.60.2351
Tôru Moriya, The Effect of Electron-Electron Interaction on the Nuclear Spin Relaxation in Metals Journal of the Physical Society of Japan. ,vol. 18, pp. 516- 520 ,(1963) , 10.1143/JPSJ.18.516
Y. Furukawa, S. Wada, K. Miyatani, T. Tanaka, M. Fukugauchi, M. Ishikawa, Nuclear spin-lattice relaxation and antiferromagnetic spin correlations in superconducting thiospinel Cu 1.5 Co 1.5 S 4 Physical Review B. ,vol. 51, pp. 6159- 6162 ,(1995) , 10.1103/PHYSREVB.51.6159
Y. Yafet, V. Jaccarino, Nuclear Spin Relaxation in Transition Metals; Core Polarization Physical Review. ,vol. 133, pp. 1630- 1637 ,(1964) , 10.1103/PHYSREV.133.A1630