Local transport properties of coated conductors by laser-scan imaging methods

Gracia Kim, William Jo, Dahyun Nam, Hyeonsik Cheong, Seoung Hyun Moon

Research output: Contribution to journalArticlepeer-review


To observe the superconducting current and structural properties of high critical temperature (Tc) superconductors (HTS), we suggest the following imaging methods: Room temperature imaging (RTI) through thermal heating, low-temperature bolometric microscopy (LTBM) and Raman scattering imaging. RTI and LTBM images visualize thermal-electric voltages as different thermal gradients at room temperature (RT) and superconducting current dissipation at near-Tc, respectively. Using RTI, we can obtain structural information about the surface uniformity and positions of impurities. LTBM images show t he flux flow in two dimensions as a function of the local critical currents. Raman imaging is transformed from Raman survey spectra in particular areas, and the Raman vibration modes can be combined. Raman imaging can quantify the vibration modes of the areas. Therefore, we demonstrate the spatial transport properties of superconducting materials by combining the results. In addition, this enables visualization of the effect of current flow on the distribution of impurities in a uniform superconducting crystalline material. These imaging methods facilitate direct examination of the local properties of superconducting materials and wires.

Original languageEnglish
Pages (from-to)1-4
Number of pages4
JournalProgress in Superconductivity and Cryogenics (PSAC)
Issue number2
StatePublished - 2016

Bibliographical note

Publisher Copyright:
© 2016, Korea Institute of Applied Superconductivity and Cryogenics. All rights reserved.


  • Low-temperature bolometric microscopy
  • Raman scattering spectroscopy
  • Room temperature imaging through thermal heating


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