Gigantic uniaxial pressure effect in single crystals of iron-based superconductors |
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| Authors: | Y Nakashima H YuiT Sasagawa |
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| Institution: | Materials and Structures Laboratory, Tokyo Institute of Technology, Kanagawa 226-8503, Japan |
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| Abstract: | In order to elucidate the anisotropic pressure effect on superconductivity in an iron-based superconductor, magnetization measurements have been performed in Ba(Fe0.92Co0.08)2As2 single crystals under uniaxial pressures applied along the c-axis. Gigantic Tc suppression, dTc/dP//c = −15 K/GPa, was observed when the anisotropic deformation with the a-expansion and c-compression was induced by the c-pressure, which should be compared with dTc/dP < +1 K/GPa in the isotropic pressure case. This suggests that the a-axis (c-axis) compression has a positive (negative) contribution to Tc. |
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| Keywords: | Ba(Fe1&minus xCox)2As2 Single crystal Uniaxial pressure effect |
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