Structural Transition and Superconductivity of Cage-Structured (La<sub>1−<i>x</i></sub><i>A</i><sub><i>x</i></sub>)<sub>3</sub>Co<sub>4</sub>Sn<sub>13</sub> (<i>A</i> = Sr, Ca)

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  • MORIYAMA Kodai
    Department of Chemistry, Graduate School of Science, Kyoto University
  • MURAKAWA Joichi
    Department of Chemistry, Graduate School of Science, Kyoto University
  • MICHIOKA Chishiro
    Department of Chemistry, Graduate School of Science, Kyoto University
  • UEDA Hiroaki
    Department of Chemistry, Graduate School of Science, Kyoto University
  • GOH Swee K.
    Department of Physics, The Chinese University of Hong Kong
  • YOSHIMURA Kazuyoshi
    Department of Chemistry, Graduate School of Science, Kyoto University

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  • 籠状構造を有する(La<sub>1−<i>x</i></sub><i>A</i><sub><i>x</i></sub>)<sub>3</sub>Co<sub>4</sub>Sn<sub>13</sub>（<i>A</i> = Sr, Ca）の構造相転移と超伝導
  • 籠状構造を有する(La[1−x]A[x])₃Co₄Sn₁₃(A=Sr,Ca)の構造相転移と超伝導
  • カゴジョウ コウゾウ オ ユウスル(La[1 − x]A[x])₃ Co ₄ Sn ₁ ₃(A=Sr,Ca)ノ コウゾウソウ テンイ ト チョウデンドウ

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<p>The quasi-skutterudite superconductor La3Co4Sn13 with the Yb3Rh4Sn13-type cage-structure presents structural transition at T* = 152 K. As in the case with isostructural compound Sr3Rh4Sn13, it has been shown that T* can be suppressed to 0 K by applying external physical pressure in La3Co4Sn13. In order to investigate chemical pressure effect on La3Co4Sn13, we have synthesized single crystals of (La1−xAx)3Co4Sn13 (A = Sr, Ca) and measured magnetic susceptibilities and specific heats. From magnetic susceptibility and specific heat measurements, it has been suggested that T* can change sensitively to the composition.</p>

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