Two- and three-dimensional connectivity and current distribution in Y Ba2 Cu3 Ox -coated conductors

D. C. Van Der Laan, M. Dhalĺ, H. J.N. Van Eck, A. Metz, B. Ten Haken, H. H.J. Ten Kate, L. M. Naveira, M. W. Davidson, Justin Schwartz

Research output: Contribution to journalArticle

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Abstract

The microstructure of Y Ba2 Cu3 Ox (YBCO)-coated conductors depends strongly on the deposition method and thickness of the YBCO layer. This letter shows how the clear qualitative difference in grain connectivity between vacuum-deposited and solution-grown layers has direct consequences for the spatial distribution of the critical current density (Jc). Pulsed-laser-deposited YBCO conductors usually have a columnar grain structure that results in a two-dimensional current network, as demonstrated with magneto-optical imaging. Consequently, their transport Jc varies considerably on length scales from 50 μm up to 5 mm, with current suppression occurring even at defects that run parallel to the macroscopic current. In contrast, the thicker YBCO coatings in metalorganic-deposited samples have a layered structure, leading to a three-dimensional current path. Magneto-optically, this is deduced from sample-wide shielding currents, while transport experiments reveal much smaller spatial variations in Jc. These results are encouraging for the further development of nonvacuum produced YBCO-coated conductors, since such three-dimensional systems are inherently more "forgiving" of local defects.

Original languageEnglish (US)
Article number032512
Pages (from-to)1-3
Number of pages3
JournalApplied Physics Letters
Volume86
Issue number3
DOIs
StatePublished - Jan 17 2005

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current distribution
conductors
defects
shielding
pulsed lasers
critical current
spatial distribution
retarding
current density
coatings
vacuum
microstructure

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

Cite this

Van Der Laan, D. C., Dhalĺ, M., Van Eck, H. J. N., Metz, A., Ten Haken, B., Ten Kate, H. H. J., ... Schwartz, J. (2005). Two- and three-dimensional connectivity and current distribution in Y Ba2 Cu3 Ox -coated conductors. Applied Physics Letters, 86(3), 1-3. [032512]. https://doi.org/10.1063/1.1855414
Van Der Laan, D. C. ; Dhalĺ, M. ; Van Eck, H. J.N. ; Metz, A. ; Ten Haken, B. ; Ten Kate, H. H.J. ; Naveira, L. M. ; Davidson, M. W. ; Schwartz, Justin. / Two- and three-dimensional connectivity and current distribution in Y Ba2 Cu3 Ox -coated conductors. In: Applied Physics Letters. 2005 ; Vol. 86, No. 3. pp. 1-3.
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Van Der Laan, DC, Dhalĺ, M, Van Eck, HJN, Metz, A, Ten Haken, B, Ten Kate, HHJ, Naveira, LM, Davidson, MW & Schwartz, J 2005, 'Two- and three-dimensional connectivity and current distribution in Y Ba2 Cu3 Ox -coated conductors', Applied Physics Letters, vol. 86, no. 3, 032512, pp. 1-3. https://doi.org/10.1063/1.1855414

Two- and three-dimensional connectivity and current distribution in Y Ba2 Cu3 Ox -coated conductors. / Van Der Laan, D. C.; Dhalĺ, M.; Van Eck, H. J.N.; Metz, A.; Ten Haken, B.; Ten Kate, H. H.J.; Naveira, L. M.; Davidson, M. W.; Schwartz, Justin.

In: Applied Physics Letters, Vol. 86, No. 3, 032512, 17.01.2005, p. 1-3.

Research output: Contribution to journalArticle

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Van Der Laan DC, Dhalĺ M, Van Eck HJN, Metz A, Ten Haken B, Ten Kate HHJ et al. Two- and three-dimensional connectivity and current distribution in Y Ba2 Cu3 Ox -coated conductors. Applied Physics Letters. 2005 Jan 17;86(3):1-3. 032512. https://doi.org/10.1063/1.1855414