Carbon-doped M9B2 thin films grown by hybrid physical-chemical vapor deposition. Pogrebnyakov, A., Redwing, J., Giencke, J., Eom, C., Vaithyanathan, V, Schlom, D., Soukiassian, A, Mi, S., Jia, C., Chen, J, Hu, Y., Cui, Y, Li, Q, & Xi, X. IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY, 15(2, 3):3321-3324, JUN, 2005. 2004 Applied Superconductivity Conference, Jacksonville, FL, OCT 03-08, 2004doi abstract bibtex Carbon-doped MgB2 thin films have been produced with hybrid physical-chemical vapor deposition (HPCVD) by adding a carbon-containing metalorganic magnesium precursor, bis(methylcyclopentadienyl)magnesium, to the carrier gas. The amount of the carbon added, thus the carbon content in the films, was controlled by the flow rate of a secondary hydrogen gas How through the precursor bubbler. X-ray diffraction and electron microscopy showed that the carbon-doped MgB2 films are textured with c-axis oriented columnar nano-grains and highly resistive amorphous areas at the grain boundaries. When the amount of carbon in the films increases, the resistivity increases dramatically while T, decreases much more slowly as the current-carrying cross section is reduced by the grain boundaries. The temperature-dependent part of the resistivity, Delta rho rho(300 K) - rho(50 K), increases only modestly until the highly resistive grain boundaries completely cut off the conducting path. The impact of the reduced cross section on critical current density J(c) is discussed.
@article{ ISI:000229767200226,
Author = {Pogrebnyakov, AV and Redwing, JM and Giencke, JE and Eom, CB and
Vaithyanathan, V and Schlom, DG and Soukiassian, A and Mi, SB and Jia,
CL and Chen, J and Hu, YF and Cui, Y and Li, Q and Xi, XX},
Title = {{Carbon-doped M9B2 thin films grown by hybrid physical-chemical vapor
deposition}},
Journal = {{IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY}},
Year = {{2005}},
Volume = {{15}},
Number = {{2, 3}},
Pages = {{3321-3324}},
Month = {{JUN}},
Note = {{2004 Applied Superconductivity Conference, Jacksonville, FL, OCT 03-08,
2004}},
Abstract = {{Carbon-doped MgB2 thin films have been produced with hybrid
physical-chemical vapor deposition (HPCVD) by adding a carbon-containing
metalorganic magnesium precursor, bis(methylcyclopentadienyl)magnesium,
to the carrier gas. The amount of the carbon added, thus the carbon
content in the films, was controlled by the flow rate of a secondary
hydrogen gas How through the precursor bubbler. X-ray diffraction and
electron microscopy showed that the carbon-doped MgB2 films are textured
with c-axis oriented columnar nano-grains and highly resistive amorphous
areas at the grain boundaries. When the amount of carbon in the films
increases, the resistivity increases dramatically while T, decreases
much more slowly as the current-carrying cross section is reduced by the
grain boundaries. The temperature-dependent part of the resistivity,
Delta rho rho(300 K) - rho(50 K), increases only modestly until the
highly resistive grain boundaries completely cut off the conducting
path. The impact of the reduced cross section on critical current
density J(c) is discussed.}},
DOI = {{10.1109/TASC.2005.848871}},
ISSN = {{1051-8223}},
EISSN = {{1558-2515}},
ResearcherID-Numbers = {{Eom, Chang-Beom/I-5567-2014
Schlom, Darrell/J-2412-2013
}},
ORCID-Numbers = {{Schlom, Darrell/0000-0003-2493-6113
Redwing, Joan/0000-0002-7906-452X}},
Unique-ID = {{ISI:000229767200226}},
}
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