Studies of structural disorder in ReBa2Cu3O7−x thin films (Re=rare earth) as a function of rare-earth ionic radius and film deposition conditions

MacManus‐Driscoll, Judith L.; Alonso, José Antonio; Wang, P.C.; Geballe, T. H.; Bravman, J. C.

doi:10.1016/0921-4534(94)90789-7

Cited by 77 publications

(54 citation statements)

References 43 publications

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“…In fact, recent reports show that even the highly oriented thin films also contain oriented grains. [41][42][43][44] We also have found evidences for granular growth in the present case. The use of higher substrate temperature also reduces the thickness of the grain boundary due to densification and better alignment of grains.…”

supporting

confidence: 58%

Pulsed laser ablation: A new route to synthesize novel superconducting compounds as oriented films

Gnanasekar

Sharon

Pinto

et al. 1996

Journal of Applied Physics

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Poly-(3-hexylthiophene)/[6,6]-phenyl-C61-butyric-acid-methyl-ester bilayer deposition by matrix-assisted pulsed laser evaporation for organic photovoltaic applications APL: Org. Electron. Photonics 5, 46 (2012) Poly-(3-hexylthiophene)/[6,6]-phenyl-C61-butyric-acid-methyl-ester bilayer deposition by matrix-assisted pulsed laser evaporation for organic photovoltaic applications Appl. Phys. Lett. 100, 073306 (2012) Solid-state source of atomic oxygen for low-temperature oxidation processes: Application to pulsed laser deposition of TiO2:N films Rev. Sci. Instrum. 83, 023903 (2012) Magnetic proximity effect in Pr0.5Ca0.5MnO3/La0.7Sr0.3MnO3 bilayered films Low Temp. Phys. 38, 41 (2012) Structural variability in La0.5Sr0.5TiO3±δ thin films Appl. Phys. Lett. 99, 261907 (2011) Additional information on J. Appl. Phys. We report here the significance of the pulsed laser ablation technique in stabilizing strained lattices that do not form by the conventional ceramic method and show that the technique offers unique possibilities to probe the structure property relationship in complicated systems. One of such systems is LuBa 2 Cu 3 O 7Ϫ␦ ; a systematic investigation of structural ͑in͒stability of its superconducting phase is presented here. Our analysis suggests that the system suffers from internal strain due to lower ionic radius of Lu 3ϩ ; however, the structure can be stabilized only as oriented films on ͗100͘ LaAlO 3 , ͗100͘ SrTiO 3 , and ͗100͘ MgO, with excellent superconducting properties ͑J c Ϸ5.0ϫ10 6 A cm Ϫ2 at 77 K͒. We have also investigated similar compounds having their stability close to their crystallographic limit. The important feature of these metastable phases is that they grow only as oriented films. Free energy of epitaxial growth of strained films are investigated and a simple growth model is proposed based on our observation. Importance of this growth model in explaining the superconductor-normal-metal-superconductor type of junctions, observed in high-T c superconductors is highlighted.

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supporting

confidence: 58%

Pulsed laser ablation: A new route to synthesize novel superconducting compounds as oriented films

Gnanasekar

Sharon

Pinto

et al. 1996

Journal of Applied Physics

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“…No other extra peaks were detected in the as-grown films from XRD measurements. c-lattice parameters were f 11.69 Å and corresponded to fully oxygenated YBCO [17].…”

Section: Xrd Analysismentioning

confidence: 99%

Determination of Ca diffusion in YBCO films by Secondary Ion Mass Spectroscopy

et al. 2003

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“…8(a)], as expected from a twinned film. 17 However, for our films, the standard (005)/(006) ratio cannot be used because the (006) peak overlaps with (200) STO peak. The observed twinning angles were around 0.45-0.55°for PD574 and 0.70-0.85°for the rest of the films and are close to the theoretically calculated value of 0.893°for YBCO films.…”

Section: B X-ray Analysismentioning

confidence: 99%

Microstructural characterization of Yba₂Cu₃O_7–δ thick films grown at very high rates and high temperatures by pulsed laser deposition

et al. 2003

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Microstructural and magnetic characterization were undertaken on high-rate, high-temperature grown YBa 2 Cu 3 O 7-␦ (YBCO) films. The films were of approximately 1 m thickness and were grown by pulsed laser deposition on (100) SrTiO 3 using a high-power industrial laser at growth temperatures between 750°C and 870°C and at growth rates of up to 4 m/min. Two YBCO layers with different c-lattice parameters were observed in the films, the higher c value occurring near the substrate interface and arising from cation disorder and oxygen nonstoichiometry, and the lower one near the film surface arising from cation disorder alone. BaCuO 2 precipitates were present near the surface of the films, indicative of partial melting during growth. The amount of BaCuO 2 increased with growth temperature. Epitaxial Y 2 O 3 also formed in increasing amounts suggestive of a different partial melting reaction in the films compared to bulk YBCO, where Y 2 BaCuO 5 coexists with liquid. Around 1 MA/cm 2 values of high critical current density (J c ) were observed in the films, and the in-field J c improved with growth temperature despite the fact that the superconducting transition width increased significantly.

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Studies of structural disorder in ReBa2Cu3O7−x thin films (Re=rare earth) as a function of rare-earth ionic radius and film deposition conditions

Cited by 77 publications

References 43 publications

Pulsed laser ablation: A new route to synthesize novel superconducting compounds as oriented films

Pulsed laser ablation: A new route to synthesize novel superconducting compounds as oriented films

Determination of Ca diffusion in YBCO films by Secondary Ion Mass Spectroscopy

Microstructural characterization of Yba₂Cu₃O_7–δ thick films grown at very high rates and high temperatures by pulsed laser deposition

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Studies of structural disorder in ReBa2Cu3O7−x thin films (Re=rare earth) as a function of rare-earth ionic radius and film deposition conditions

Cited by 77 publications

References 43 publications

Pulsed laser ablation: A new route to synthesize novel superconducting compounds as oriented films

Pulsed laser ablation: A new route to synthesize novel superconducting compounds as oriented films

Determination of Ca diffusion in YBCO films by Secondary Ion Mass Spectroscopy

Microstructural characterization of Yba2Cu3O7–δ thick films grown at very high rates and high temperatures by pulsed laser deposition

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Microstructural characterization of Yba₂Cu₃O_7–δ thick films grown at very high rates and high temperatures by pulsed laser deposition