Nanoscale flux pinning sites in high-T c superconductors

Research output: Chapter in Book/Report/Conference proceedingChapter

12 Citations (Scopus)

Abstract

Ideal flux pining centres in high-T c superconductors should be of nanometre size as the coherence length, ξ, is so small. Therefore, the optimisation of high-T c superconductor samples concerning high critical current densities and high flux pinning has to take place in the nanometre range. An important goal of the current research is to find specific preparation strategies to create such ideal flux pining sites already during the sample processing. By means of AFM and STM measurements at ambient conditions, we have investigated the topographies of various samples of YBa 2Cu 3O x (YBCO), NdBa 2Cu 3O x (NdBCO), SmBa 2Cu 3O x (SmBCO), (Sm,Eu,Gd)Ba 2Cu 3O x (SEG) and (Nd,Eu,Gd)Ba 2Cu 3O x (NEG) high-T c superconductors. We find that the two systems with the highest critical current densities (NEG, SEG) and hence, the strongest flux pinning, exhibit microstructures on the nanometre scale which are remarkably different from those obtained in the YBCO system. The stripe-like growth structures observed in our topography measurements may be the key for the considerable improvements concerning the critical current densities especially at high magnetic fields and elevated operating temperature (77 K).

Original languageEnglish
Title of host publicationPhysica Status Solidi C: Conferences
Pages1720-1725
Number of pages6
Volume2
Edition5
DOIs
Publication statusPublished - 2005

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flux pinning
critical current
current density
topography
operating temperature
atomic force microscopy
preparation
microstructure
optimization
magnetic fields

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Koblischka, M. R., Winter, M., Hu, A., Miryala, M., Hartmann, U., & Murakami, M. (2005). Nanoscale flux pinning sites in high-T c superconductors In Physica Status Solidi C: Conferences (5 ed., Vol. 2, pp. 1720-1725) https://doi.org/10.1002/pssc.200460819

Nanoscale flux pinning sites in high-T c superconductors . / Koblischka, Michael Rudolf; Winter, M.; Hu, A.; Miryala, Muralidhar; Hartmann, U.; Murakami, Masato.

Physica Status Solidi C: Conferences. Vol. 2 5. ed. 2005. p. 1720-1725.

Research output: Chapter in Book/Report/Conference proceedingChapter

Koblischka, MR, Winter, M, Hu, A, Miryala, M, Hartmann, U & Murakami, M 2005, Nanoscale flux pinning sites in high-T c superconductors in Physica Status Solidi C: Conferences. 5 edn, vol. 2, pp. 1720-1725. https://doi.org/10.1002/pssc.200460819
Koblischka MR, Winter M, Hu A, Miryala M, Hartmann U, Murakami M. Nanoscale flux pinning sites in high-T c superconductors In Physica Status Solidi C: Conferences. 5 ed. Vol. 2. 2005. p. 1720-1725 https://doi.org/10.1002/pssc.200460819
Koblischka, Michael Rudolf ; Winter, M. ; Hu, A. ; Miryala, Muralidhar ; Hartmann, U. ; Murakami, Masato. / Nanoscale flux pinning sites in high-T c superconductors Physica Status Solidi C: Conferences. Vol. 2 5. ed. 2005. pp. 1720-1725
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