A Noncontact Tc Evaluation Technique Using a Hall Probe Array

Kyu Jeong Song, Ji Chon Lim, Rock Kil Ko, Chan Park, Justin Schwartz

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Abstract

A noncontact superconducting transition temperature (Tc) measurement system using a Hall probe array was devised to measure Tc of high-temperature superconductor (HTS) coated conductors (CCs) without physical contact to the surface, thereby avoiding contact with electrodes, which can cause damage to the conductor surface. The variations of the Hall voltage (V) distribution, which comes from the distribution of magnetic field on the surface of the CC, under a fixed applied field at different temperatures were used to estimate Tc. The measured Tc of the HTS GdBCO CC made by Sunam was approximately 93.2 K by the noncontact Tc method, as compared to approximately 93.5 K by the conventional four-probe-contact method in a commercial PPMS. Thus, the Tc obtained by this system is comparable with that from the transport four-probe method. In addition, the noncontact Tc measurement system devised and used in this study is simple because it does not need comparison and conversion with values measured by contact methods.

Original languageEnglish (US)
Article number7839933
JournalIEEE Transactions on Applied Superconductivity
Volume27
Issue number4
DOIs
StatePublished - Jun 2017

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All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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