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首页> 外文期刊>Applied Magnetic Resonance >Vortex Excitations Above T_c in the Cuprate Superconductor Bi_2Sr_2Ca_2Cu_3O_(10) as Revealed by ESR
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Vortex Excitations Above T_c in the Cuprate Superconductor Bi_2Sr_2Ca_2Cu_3O_(10) as Revealed by ESR

机译:ESR揭示的铜酸盐超导体Bi_2Sr_2Ca_2Cu_3O_(10)中T_c上方的涡旋激发

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摘要

Using electron spin resonance (ESR) technique we have obtained data evidencing the existence of magnetic vortices in high-temperature superconductors at temperatures above the critical one T_c. We have studied magnetic excitations in Bi_2Sr_2Ca_2Cu_3O_(10) single crystals above Tc with the method of surface spin decoration. The surface layer of diphenylpicrylhydrazyl was used as a sensitive probe of magnetic field distortions. The temperature dependence of the ESR signal parameters has indicated that far above T_c the magnetic flux of a sample is affected by the superconducting order parameter fluctuations while close to T_c its changes are due to vortex-type excitations.
机译:使用电子自旋共振(ESR)技术,我们获得了证明在温度高于临界T_c的高温超导体中存在磁涡旋的数据。通过表面自旋修饰的方法研究了Tc以上Bi_2Sr_2Ca_2Cu_3O_(10)单晶的磁激发。二苯基吡啶甲基肼基的表面层用作磁场畸变的敏感探针。 ESR信号参数的温度相关性表明,远高于T_c的样品,其磁通量会受到超导阶跃参数波动的影响,而接近T_c时,其变化是由于涡旋型激发引起的。

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