한국초전도ㆍ저온공학회논문지 (Progress in Superconductivity and Cryogenics)

  • 제19권1호
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  • Pages.26-29
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  • 2017
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  • 1229-3008(pISSN)
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  • 2287-6251(eISSN)
한국초전도저온학회 (The Korean Society of Superconductivity and Cryogenics)
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Selective detection of AC transport current distributions in GdBCO coated conductors using low temperature scanning Hall probe microscopy

  • 투고 : 2017.02.13
  • 심사 : 2017.03.11
  • 발행 : 2017.03.31
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초록

We studied the distribution of the current density and its magnetic-field dependence in GdBCO coated conductors with AC bias currents using low temperature scanning Hall probe microscopy. We selectively measured magnetic field profiles from AC signal obtained by Lock-in technique and calculated current distributions by inversion calculation. In order to confirm the AC measurement results, we applied DC current corresponding to RMS value of AC current and compared distribution of AC and DC transport current. We carried out the same measurements at various external DC magnetic fields, and investigated field dependence of AC current distribution. We notice that the AC current distribution unaffected by external magnetic fields and preserved their own path on the contrary to DC current.

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참고문헌

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