YBa2Cu3O7-δ films with high critical current density on epitaxial films of Ba2LaNbO6, a new perovskite substrate for YBa2CuO7-δ superconductor

S. P. Pai; J. Jasudasan; P. R. Apte; R. Pinto; J. Kurian; P. K. Sajith; J. James; J. Koshy

doi:10.1209/epl/i1997-00413-7

All issues

Volume 39 / No 6 (September 1997)

Europhys. Lett., 39 6 (1997) 669-674

Abstract

Issue		Europhys. Lett. Volume 39, Number 6, September 1997


Page(s)		669 - 674
Section		Condensed matter: electronic, structure, electrical, magnetic and optical properties
DOI		https://doi.org/10.1209/epl/i1997-00413-7
Published online		01 September 2002

Europhys. Lett., 39 (6), pp. 669-674 (1997)

YBa₂Cu₃O_7-δ films with high critical current density on epitaxial films of Ba₂LaNbO₆, a new perovskite substrate for YBa₂CuO_7-δ superconductor

S. P. Pai¹, J. Jasudasan¹, P. R. Apte¹, R. Pinto¹, J. Kurian², P. K. Sajith², J. James² and J. Koshy²

¹ Tata Institute of Fundamental Research, Mumbai 400005, India
² Regional Research Laboratory (CSIR), Trivandrum 695019, India

Received: 24 March 1997
Accepted: 6 August 1997

Abstract

$\rm Ba_2\!\!LaMb\!\!O_6$ , a new perovskite substrate material for $\rm Y\!\!ptBa_2\!\!Cu_3\!\!O_{7\hbox{-}\delta}$ , has been grown epitaxially on (100) MgO by pulsed-laser ablation method. A superconducting $\rm Y Ba_2Cu_3O_{7\hbox{-}\delta}$ film in situ grown on an epitaxial $\rm Ba_2LaNbO_6$ film gave a $T_{\rm C}(0)=90\;{\rm K}$ with a transition width $\Delta T=0.5\;{\rm K}$ . The $\rm YBa_2Cu_3O_{7\hbox{-}\delta}$ films exhibited $(00\ell)$ orientation of an orthorhombic $\rm YBa_2Cu_3O_{7\hbox{-}\delta}$ phase and showed almost perfect metallic behaviour in the normal state with resistance ratio $(R_{\rm 300K}/R_{\rm 100K})=2.98$ . Critical current density of $5\times 10^6\;{\rm A/cm^2}$ at 77 K was obtained consistently for the $\rm YBa_2Cu_3O_{7\hbox{-}\delta}$ films in situ grown on epitaxial $\rm Ba_2LaNbO_6$ films.

PACS: 74.76.Bz – High-T_c films

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