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Proceedings Paper

Pulsed laser deposition of oxide cuprate superlattices
Author(s): Giusepe Balestrino; Sergio Martellucci; P. G. Medaglia; A. Paoletti; G. Petrocelli; M. Tonti
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Paper Abstract

Pulsed laser deposition technique (PLD) has been successfully used to grow artificially layered films of the CuBa2(Ca1-xSrx)n-1 CunOy compound using only two targets having nominal composition BaCuOy and (Ca1-xSrx)CuOy respectively. n was varied between 2 and 5. The kinematic analysis of the x-ray diffraction spectra reveals that the average random discrete thickness fluctuations which affects both the BaCuOy and (Ca1-xSrx)CuOy layers are much smaller than one atomic layer. Such features are confirmed by the appearance of sharp peaks even for the nequals2 artificially layered structure where only one (Ca1-xSrx)CuOy cell is deposited in the stacking sequence. A major difference is found in the behavior of resistivity between films containing Sr and Ca respectively. Namely (BaCuO2)2/[(Ca1-xSrx)CuOy]n films never show any trace of superconductivity, while [BaCuO2]n/[CaCuO2]n films result to have, for growth oxygen pressures P > 0.2 mbar a full transition by laser deposition technique with a low interfacial disorder and give strong support to the idea of synthesizing new artificial high Tc structures by the PLD technique.

Paper Details

Date Published: 14 July 1998
PDF: 4 pages
Proc. SPIE 3423, Second GR-I International Conference on New Laser Technologies and Applications, (14 July 1998); doi: 10.1117/12.316607
Show Author Affiliations
Giusepe Balestrino, INFM and Univ. di Roma Tor Vergata (Italy)
Sergio Martellucci, INFM and Univ. di Roma Tor Vergata (Italy)
P. G. Medaglia, INFM and Univ. di Roma Tor Vergata (Italy)
A. Paoletti, INFM and Univ. di Roma Tor Vergata (Italy)
G. Petrocelli, INFM and Univ. di Roma Tor Vergata (Italy)
M. Tonti, INFM and Univ. di Roma Tor Vergata (Italy)


Published in SPIE Proceedings Vol. 3423:
Second GR-I International Conference on New Laser Technologies and Applications
Alexis Carabelas; Paolo Di Lazzaro; Amalia Torre; Giuseppe Baldacchini, Editor(s)

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