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Superconductivity in Bi2Sr2(Sr,Ca)CuOi multilayers obtained by molecular beam epitaxy

Salvato, M. ; Attanasio, G. ; Carbone, G. LU ; Di Luccio, T. ; Prischepa, S. L. ; Russo, R. and Maritato, L. (1999) In IEEE Transactions on Applied Superconductivity 9(2 PART 2). p.2006-2009
Abstract

Bi-based high temperature superconduting multilayers have been obtained by Molecular Beam Epitaxy (MBE) using a deposition method which consists of both co-deposition and growth interruption techniques. We have studied two kinds of structures in which a layer of BizSrzCuOg+s (2201) is alternately stacked by an insulating layer of CaCuOi or SrCuOi in order to obtain 2201/CaCuO2 or IWl/SrCuO?. multilayers. Reflection High Energy Electron Diffraction (RHEED), used to control the quality of the interfaces and the two-dimensional growth mode, gives evidence of an increase in the surface roughness increasing the number of periods. The layered structure has been confirmed comparing experimental and simulated Xray spectra. The R vs. T curves of... (More)

Bi-based high temperature superconduting multilayers have been obtained by Molecular Beam Epitaxy (MBE) using a deposition method which consists of both co-deposition and growth interruption techniques. We have studied two kinds of structures in which a layer of BizSrzCuOg+s (2201) is alternately stacked by an insulating layer of CaCuOi or SrCuOi in order to obtain 2201/CaCuO2 or IWl/SrCuO?. multilayers. Reflection High Energy Electron Diffraction (RHEED), used to control the quality of the interfaces and the two-dimensional growth mode, gives evidence of an increase in the surface roughness increasing the number of periods. The layered structure has been confirmed comparing experimental and simulated Xray spectra. The R vs. T curves of the 22Ql/SrCuC>2 multilayers present an onset and behave differently from those of the single phase samples with the same stoichiometry but they are not superconducting down to T = 4.2K. On the contrary, the 22Ql/CaCuC>2 samples are superconducting with critical temperatures strongly depending on the CaCuOz thickness.

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author
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publishing date
type
Contribution to journal
publication status
published
in
IEEE Transactions on Applied Superconductivity
volume
9
issue
2 PART 2
pages
4 pages
publisher
IEEE - Institute of Electrical and Electronics Engineers Inc.
external identifiers
  • scopus:0032646297
ISSN
1051-8223
DOI
10.1109/77.784857
language
English
LU publication?
no
id
10c7a371-4e16-4cb3-b439-013f6d057dde
date added to LUP
2021-12-15 12:08:34
date last changed
2022-02-02 02:08:45
@article{10c7a371-4e16-4cb3-b439-013f6d057dde,
  abstract     = {{<p>Bi-based high temperature superconduting multilayers have been obtained by Molecular Beam Epitaxy (MBE) using a deposition method which consists of both co-deposition and growth interruption techniques. We have studied two kinds of structures in which a layer of BizSrzCuOg+s (2201) is alternately stacked by an insulating layer of CaCuOi or SrCuOi in order to obtain 2201/CaCuO2 or IWl/SrCuO?. multilayers. Reflection High Energy Electron Diffraction (RHEED), used to control the quality of the interfaces and the two-dimensional growth mode, gives evidence of an increase in the surface roughness increasing the number of periods. The layered structure has been confirmed comparing experimental and simulated Xray spectra. The R vs. T curves of the 22Ql/SrCuC&gt;2 multilayers present an onset and behave differently from those of the single phase samples with the same stoichiometry but they are not superconducting down to T = 4.2K. On the contrary, the 22Ql/CaCuC&gt;2 samples are superconducting with critical temperatures strongly depending on the CaCuOz thickness.</p>}},
  author       = {{Salvato, M. and Attanasio, G. and Carbone, G. and Di Luccio, T. and Prischepa, S. L. and Russo, R. and Maritato, L.}},
  issn         = {{1051-8223}},
  language     = {{eng}},
  number       = {{2 PART 2}},
  pages        = {{2006--2009}},
  publisher    = {{IEEE - Institute of Electrical and Electronics Engineers Inc.}},
  series       = {{IEEE Transactions on Applied Superconductivity}},
  title        = {{Superconductivity in Bi<sub>2</sub>Sr<sub>2</sub>(Sr,Ca)CuOi multilayers obtained by molecular beam epitaxy}},
  url          = {{http://dx.doi.org/10.1109/77.784857}},
  doi          = {{10.1109/77.784857}},
  volume       = {{9}},
  year         = {{1999}},
}