Supercurrents in HgBa{sub 2}CaCu{sub 2}O{sub 6+{delta}} and TlBa{sub 2}CaCu{sub 2}O{sub 7} epitaxial thin films

Journal Article · Tue Jun 01 00:00:00 EDT 1999 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.124210· OSTI ID:345408

Gapud, A A; Wu, J Z; Fang, L; Yan, S L; Xie, Y Y ^[1]; Siegal, M P; Overmyer, D L ^[2]

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1. Department of Physics and Astronomy, University of Kansas, Lawrence, Kansas 66045-2151 (United States)
2. Sandia National Laboratories, Albuquerque, New Mexico 87185 (United States)

The availability of high-quality epitaxial thin films of HgBa{sub 2}CaCu{sub 2}O{sub 6+{delta}} (Hg-1212) and TlBa{sub 2}CaCu{sub 2}O{sub 7} (Tl-1212) with high critical current densities (J{sub c}) has made it possible to examine and compare the J{sub c} of these species. Results reveal that the J{sub c} of 1212 species have very similar temperature behavior at low fields, strongly suggesting that the 30 K shift in critical temperature (T{sub c}) induced by the exchange of Hg and Tl in the 1212 structure is due largely to a change in charge carrier density and/or electronic band structure. {copyright} {ital 1999 American Institute of Physics.}

• OSTI ID: 345408
• Journal Information: Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 25 Vol. 74; ISSN APPLAB; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BARIUM COMPOUNDS
BARIUM OXIDES
CALCIUM COMPOUNDS
CALCIUM OXIDES
COPPER OXIDES
CRITICAL CURRENT
EPITAXY
HIGH-TC SUPERCONDUCTORS
MERCURY COMPOUNDS
MERCURY OXIDES
THALLIUM COMPOUNDS
THALLIUM OXIDES
THIN FILMS
TRANSITION TEMPERATURE