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Upper critical magnetic field and vortex-free state in very thin epitaxial δ-MoN films grown by polymer-assisted deposition

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Title
Upper critical magnetic field and vortex-free state in very thin epitaxial δ-MoN films grown by polymer-assisted deposition
Author(s)
Haberkorn N.; Zhang Y.Y.; Jeehoon Kim; McCleskey T.M.; Depaula R.F.; Tajima T.; Jia Q.X.; Civale L.
Publication Date
2013-10
Journal
SUPERCONDUCTOR SCIENCE & TECHNOLOGY, v.26, no.10, pp.105023 -
Publisher
IOP PUBLISHING LTD
Abstract
We measured the thickness dependence of the superconducting properties in epitaxial δ-MoN thin films grown on α-Al2O3 (001) substrates by polymer-assisted deposition. Our results indicate that the superconducting properties such as the upper critical field (μ 0Hc2 ≈ 10 T) and the superconducting critical temperature (Tc = 12.5 K) are thickness independent for films thicker than ∼36 nm. By measuring the critical current density (Jc) in the vortex-free state, which coincides with the depairing current density (J0), we estimate that films thicker than ∼36 nm have a coherence length ξ(0) = 5.8 ± 0.2 nm and penetration depth λ(0) = 420 ± 50 nm. We found that it is possible to enhance the Hc2 (0) values to close to 10 T without any appreciable reduction in Tc. © 2013 IOP Publishing Ltd
URI
https://pr.ibs.re.kr/handle/8788114/4470
ISSN
0953-2048
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Center for Artificial Low Dimensional Electronic Systems(원자제어 저차원 전자계 연구단) > Journal Papers (저널논문)
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