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Nernst effect in Tl-Ba-Ca-Cu-O superconducting films due to infrared laser heating

机译:Tl-Ba-Ca-Cu-O超导薄膜由于红外激光加热而产生的能斯特效应

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摘要

A Nernst effect has been observed in a high temperature superconductor for the first time. Irradiating superconducting Tl–Ba–Ca–Cu–O thin films by short pulses of a TEA-CO2 laser, a photovoltaic signal is detected perpendicular to a magnetic field applied parallel to the film surface. The signal is attributed to magnetic flux line depinning and flux line transport driven by the laser induced temperature gradient. The results are described by thermal flux line activation leading to a calculated distribution of pinning energies from 100 K to 4000 K.
机译:在高温超导体中首次观察到能斯特效应。用TEA-CO2激光的短脉冲辐照超导Tl-Ba-Ca-Cu-O薄膜,检测到垂直于平行于薄膜表面施加的磁场的光伏信号。该信号归因于由磁感应强度梯度驱动的磁通线固定和磁通线传输。通过热通量线激活来描述结果,该激活导致计算出的钉扎能量从100 K到4000 K的分布。

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