Dependence of transport-current losses in MgB2 superconducting wire on temperature and frequency

Kazuhiro Kajikawa, Tomohiro Kawano, Ryota Osaka, Taketsune Nakamura, Michinaka Sugano, Masaya Takahashi, Tsuyoshi Wakuda

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Abstract

AC losses of a monofilamentary MgB2 wire in a self-field are experimentally evaluated at several temperatures and frequencies. The alternating transport currents are applied to the straight sample wire, and the AC losses are observed electrically with a lock-in amplifier. The temperature of the sample wire was adjusted by a conduction cooling with gaseous helium, and the stability was below ± 0.1 K near a fixed temperature. The temperature dependence of the transport-current losses was roughly explained with a theoretical expression based on the Bean model, though the experimental results of the transport-current losses slightly depend on the frequency.

Original languageEnglish
Article number5443621
Pages (from-to)2111-2114
Number of pages4
JournalIEEE Transactions on Applied Superconductivity
Volume20
Issue number3
DOIs
Publication statusPublished - Jun 1 2010

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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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