Measurement of local currents in superconductors using an in-situ high field magneto-optical microscope

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A contactless method is used to measure the local current density in superconductors at fields up to 7 T with a spatial resolution better than 1 {mu}m. The local currents are derived from magneto-optical images using a powerful inversion scheme. The interpretation of global experimental data on flux flow, flux creep and relaxation phenomena is hindered if the magnetic moment of the sample as a whole is measured, while the current flow in the sample is not uniform. This problem can be overcome by the local measurement of the currents flowing in the sample that is discussed below.

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3 p.

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Wijngaarden, R.J.; Surdeanu, R. & Griessen, R. August 1, 1997.

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A contactless method is used to measure the local current density in superconductors at fields up to 7 T with a spatial resolution better than 1 {mu}m. The local currents are derived from magneto-optical images using a powerful inversion scheme. The interpretation of global experimental data on flux flow, flux creep and relaxation phenomena is hindered if the magnetic moment of the sample as a whole is measured, while the current flow in the sample is not uniform. This problem can be overcome by the local measurement of the currents flowing in the sample that is discussed below.

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3 p.

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OSTI as DE97007023

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  • International conference on materials and mechanisms of superconductivity: high temperature superconductors, Beijing (China), 28 Feb - 4 Mar 1997

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  • Other: DE97007023
  • Report No.: ANL/MSD/CP--93501
  • Report No.: CONF-970235--6
  • Grant Number: W-31109-ENG-38
  • Office of Scientific & Technical Information Report Number: 510595
  • Archival Resource Key: ark:/67531/metadc690954

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  • August 1, 1997

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  • Aug. 14, 2015, 8:43 a.m.

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  • Dec. 15, 2015, 11:41 a.m.

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Wijngaarden, R.J.; Surdeanu, R. & Griessen, R. Measurement of local currents in superconductors using an in-situ high field magneto-optical microscope, article, August 1, 1997; Illinois. (digital.library.unt.edu/ark:/67531/metadc690954/: accessed September 18, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.