Vortex phase diagram of Bi2Sr2CaCu2Oy investigated by the resistivity measurements

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作者：

Univ of Tokyo, Tokyo, Japan ^{[1
]}

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来源：

Phys C Supercond | / pt 4卷 / 2015-2016期

关键词：

Bismuth compounds - Crystal lattices - Crystal orientation - Electric conductivity measurement - Glass transition - High temperature superconductors - Magnetic field effects - Phase diagrams - Thermal effects;

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摘要：

The mixed state of Bi2Sr2CaCu2Oy was investigated by the means of the resistivity measurements with the magnetic field applied parallel to the crystallographic c-axis direction. Under relatively low magnetic field, the resistivity showed an abrupt change with temperature at the vortex-lattice melting point, while smooth temperature dependence was observed at higher fields. Non-ohmic behavior of the resistivity was observed over a wide range of temperature and magnetic field, which apparently disappeared at high magnetic field. We discuss the observed behavior in the context of a possible vortex-glass transition.

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