Superconducting YBa<SUB>2</SUB>Cu<SUB>3</SUB>O<SUB>7</SUB>-δ thick films on Ba<SUB>2</SUB>RETaO<SUB>6</SUB> (RE = Pr<SUB>5</SUB> Nd, Eu, and Dy) substrates
- Babu, T. G. N.
- Koshy, J.
- Sudershan, Y.
- Bhat, S. V.
DOIAbstract
Thick films of YBa2Cu3O7-δ fabricated on polycrystalline Ba2RETaO6 (where RE = Pr, Nd. Eu, and Dy) substrates by dip-coating and partial melting techniques are textured and oaxis oriented, showing predominantly (00/) orientation. All the thick films show a superconducting zero resistance transition of 90 K. SEM studies clearly indicate platelike and needlelike grain growth over a wide area of the thick films. The values of the critical current density for these thick films are~104 A/cm2 at 77 K as determined by the nonresonant R.F. absorption method. Various processing conditions that affect the critical current density of thick films are also discussed
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