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Superconducting And Normal State Properties Of The Systems La1−Xmxpt4ge12 (M=Ce,Th), K. Huang, D. Yazici, Benjamin D. White, I. Jeon, A. J. Breindel, N. Pouse, M. B. Maple
Superconducting And Normal State Properties Of The Systems La1−Xmxpt4ge12 (M=Ce,Th), K. Huang, D. Yazici, Benjamin D. White, I. Jeon, A. J. Breindel, N. Pouse, M. B. Maple
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Electrical resistivity, magnetization, and specific heat measurements were performed on polycrystalline samples of the filled-skutterudite systems La1−xMxPt4Ge12 (M = Ce and Th). Superconductivity in LaPt4Ge12 was quickly suppressed with Ce substitution and no evidence for superconductivity was found down to 1.1 K for x > 0.2. Temperature-dependent specific heat data at low temperatures for La1−xCexPt4Ge12 show a change from powerlaw to exponential behavior, which may be an indication for multiband superconductivity in LaPt4Ge12. …
Investigation Of Superconducting And Normal-State Properties Of The Filled-Skutterudite System Prpt4ge12−Xsbx, I. Jeon, K. Huang, D. Yazici, N. Kanchanavatee, Benjamin D. White, P.-C. Ho, S. Jang, N. Pouse, M. B. Maple
Investigation Of Superconducting And Normal-State Properties Of The Filled-Skutterudite System Prpt4ge12−Xsbx, I. Jeon, K. Huang, D. Yazici, N. Kanchanavatee, Benjamin D. White, P.-C. Ho, S. Jang, N. Pouse, M. B. Maple
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We report a study of the superconducting and normal-state properties of the filled-skutterudite system PrPt4Ge12−xSbx . Polycrystalline samples with Sb concentrations up to x = 5 were synthesized and investigated by means of x-ray diffraction, electrical resistivity, magnetic susceptibility, and specific heat measurements. We observed a suppression of superconductivity with increasing Sb substitution up to x = 4, above which no signature of superconductivity was observed down to 140 mK. The Sommerfeld coefficient, γ , of superconducting specimens decreases with increasing x up to x = 3, suggesting that superconductivity may depend on the …