Measurement of Critical Currents in Superconducting Thin YBa$_{2}$Cu$_{3}$O$_{7-\delta}$ Films by the Magnetic Susceptibility Method Using Open-Faced Coils
作者: A. A. Kalenyuk, G. G. Kaminskyi, A. V. Semenov, V. O. Moskaliuk, V. S. Flis
作者单位: 1G.V. Kurdyumov Institute for Metal Physics, NAS of Ukraine, 36 Academician Vernadsky Blvd., UA-03680 Kyiv-142, Ukraine
2Institute of Physics, NAS of Ukraine, 46 Nauky Ave., 03028 Kyiv, Ukraine
刊名: Metallofiz. Noveishie Tekhnol., 2017, Vol.39 (4), pp.441-455
来源数据库: G.V. Kurdyumov Institute for Metal Physics, National Academy of Science of the Ukraine
DOI: 10.15407/mfint.39.04.0441
关键词: critical currentcritical temperaturemagnetic susceptibility in an alternating fieldcritical state modelsuperconductor.
原始语种摘要: The nonlinear magnetic susceptibility $\chi$($H_{\textrm{ac}}$) and critical current $J_{\textrm{c}}$ in thin YBa$_2$Cu$_3$O$_{7-\delta}$ films are measured using planar spiral open-faced pick-up coils. The real and imaginary parts of a generalized susceptibility $\tilde{\chi}(a, h)$ are calculated within the framework of the critical state model for an arbitrary ratio $a = r/R$ of the radius of a single-turn pick-up coil $r$ to the superconducting thin-film disc radius $R$. Well known results of the Clem–Sanchez model in the limit $a \to \infty$ are reproduced for nonlinear complex magnetic susceptibility $\chi$($h$), where $h$($J_{\textrm{c}}$($T$), $H_{\textrm{ac}}$) is reduced dimensionless field amplitude. Relative systematic error of measured $J_{\textrm{c}}$ is shown to be...
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  • Cu 
  • susceptibility 磁化率
  • delta 三角洲
  • tilde 代字号
  • generalized 广义
  • imaginary 假想的
  • dependence 从属
  • magnetometer 地磁仪
  • critical 临界的
  • maximum 最大值