G. Petrocelli

Electrical transport properties of artificially layered films of [BaCuO2](2)/[(Sr,Ca)CuO2](n)

In this letter we show that SrCuO2/BaCuO2 and CaCuO2/BaCuO2 based artificial structures of very good crystallographic quality can be grown by pulsed laser deposition. We demonstrate that the most important parameters which determine the superconductive properties are the chemical composition, the oxygen growth pressure, and the CO2 contamination. A major difference is found in the behavior of resistivity between films containing Sr and Ca, respectively. Namely [BaCuO2]2/[SrCuO2]n films never show any trace of superconductivity, while [BaCuO2]2/[CaCuO2]n films result in having, for growth oxygen pressures PO2⩾0.2 mbar, a full transition with Tc (zero resistance) up to 46 K. Furthermore we demonstrate that even a tiny amount of CO2 in the oxygen growth atmosphere can suppress completely the superconducting properties of these artificial structures.

PULSED LASER DEPOSITION OF SRCUO2/CACUO2 SUPERLATTICES

We have shown that the pulsed laser deposition (PLD) technique, with no in situ diagnostic, can be used to grow good quality superlattices based on the infinite layer compounds SrCuO2 and CaCuO2. We demonstrated that the major source of disorder in these superlattices, grown at temperatures lower than 600u2009°C, comes from random discrete thickness fluctuations. However the random discrete thickness fluctuations affect essentially only one unit cell. This makes the PLD technique very attractive for the growth of new artificial high‐Tc structures based on the infinite layers compounds.

Superconducting properties of [ BaCuO x ] 2 / [ CaCuO 2 ] n artificial structures with ultrathick CaCuO 2 blocks

The electrical transport properties of

Superconducting properties of [BaCuO_x]_2/[CaCuO_2]_n artificial structures with ultrathick CaCuO_2 blocks

[{mathrm{BaCuO}}_{x}{]}_{2}/[{mathrm{CaCuO}}_{2}{]}_{n}(mathrm{C}mathrm{B}mathrm{C}mathrm{C}mathrm{O}ensuremath{-}2ifmmodetimeselsetexttimesfi{}n)

Artificially layered films of CuBa2 (Ca1−xSrx)n−1CunOy grown using pulsed laser deposition

underdoped high-temperature superconducting superlattices grown by pulsed laser deposition have been investigated. Starting from the optimally doped

EXAFS study of the [BaCuO2](2)/[(Ca,Sr)CuO2](n) artificial superconducting superlattices

mathrm{C}mathrm{B}mathrm{C}mathrm{C}mathrm{O}ensuremath{-}2ifmmodetimeselsetexttimesfi{}2

Strain analysis and structural characterization of SrCuO2/CaCuO2 infinite layer superlattices

superlattice, having three

Structural analysis of infinite layer superlattices grown by pulsed laser deposition

{mathrm{CuO}}_{2}

Structural ordering and chemical configuration of Ba-based infinite-layer superlattices

planes and

Structure refinement of infinite-layer superlattices

{T}_{c}