Epitaxial HgBa{sub 2}Ca{sub 2}Cu{sub 3}O{sub {ital y}} films on SrTiO{sub 3} substrates prepared by spray pyrolysis technique
- Superconductivity Research Laboratory, International Superconductivity Technology Center, 1-10-13 Shinonome, Koto-ku, Tokyo 135 (Japan)
HgBa{sub 2}Ca{sub 2}Cu{sub 3}O{sub {ital y}} (Hg-1223) films with a thickness of 1{endash}2 {mu}m and {ital T}{sub {ital c}} (zero){approximately}130 K have been fabricated by utilizing a spray pyrolysis technique. X-ray diffraction indicates that the films consist of predominantly Hg-1223 phase grains with {ital c}-axis orientation. Moreover, the oscillation photograph taken by a Weissenberg camera confirms that the film grains are in-plane aligned and epitaxially grown on SrTiO{sub 3}. In electrical transport measurements, the as-fabricated film exhibits a {ital T}{sub {ital c}} (zero) of 123 K, and a zero-field {ital J}{sub {ital c}} of 3.7{times}10{sup 5} A/cm{sup 2} at 77 K. Additional post-annealing at 320 {degree}C for 50 h in flowing oxygen has improved the transport properties as {ital T}{sub {ital c}} (zero){approximately}130 K and {ital J}{sub {ital c}}{approximately}4.4{times}10{sup 5} A/cm{sup 2} (77 K, 0 T). {copyright} {ital 1996 American Institute of Physics.}
- OSTI ID:
- 397396
- Journal Information:
- Applied Physics Letters, Vol. 69, Issue 22; Other Information: PBD: Nov 1996
- Country of Publication:
- United States
- Language:
- English
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