A Noncontact Tc Evaluation Technique Using a Hall Probe Array

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

doi:10.1109/TASC.2017.2663763

A Noncontact T_c Evaluation Technique Using a Hall Probe Array

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

Research output: Contribution to journal › Article › peer-review

1 Scopus citations

Abstract

A noncontact superconducting transition temperature (T_c) measurement system using a Hall probe array was devised to measure T_c 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 T_c. The measured T_c of the HTS GdBCO CC made by Sunam was approximately 93.2 K by the noncontact T_c method, as compared to approximately 93.5 K by the conventional four-probe-contact method in a commercial PPMS. Thus, the T_c obtained by this system is comparable with that from the transport four-probe method. In addition, the noncontact T_c 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 language	English (US)
Article number	7839933
Journal	IEEE Transactions on Applied Superconductivity
Volume	27
Issue number	4
DOIs	https://doi.org/10.1109/TASC.2017.2663763
State	Published - Jun 2017

All Science Journal Classification (ASJC) codes

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

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10.1109/TASC.2017.2663763

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title = "A Noncontact Tc Evaluation Technique Using a Hall Probe Array",

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.",

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A Noncontact T_c Evaluation Technique Using a Hall Probe Array

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