Title :
Properties of tunnel junctions with [103]YBa/sub 2/Cu/sub 3/O/sub y//SrTiO/sub 3//[013]YBa/sub 2/Cu/sub 3/O/sub y/ layered structure
Author :
Matsui, T. ; Suzuki, T. ; Kimura, H. ; Yamaguchi, D. ; Ueda, A. ; Kamijo, H.
Author_Institution :
Fuji Electr. Corp. Res. & Dev. Ltd., Yokosuka, Japan
fDate :
6/1/1995 12:00:00 AM
Abstract :
Properties of tunnel junctions have been studied in a [103]-oriented YBa/sub 2/Cu/sub 3/O/sub y//SrTiO/sub 3//[013]-oriented YBa/sub 2/Cu/sub 3/O/sub y/ ([103]YBCO/STO/(013)YBCO) layered structures. In the junctions, we observed similar electrical properties to those in [001]-oriented YBCO/barrier/[001]-oriented YBCO junctions, such as broad gap like structure and a conductance peak at zero bias voltage. Cross-sectional observation for the junction revealed that facets were mainly formed by [100]-, [010]- and [001]-planes at the bottom of the top [103]YBCO layer and by [010]- and [001]-planes at the bottom [013]YBCO surface, respectively. The observation also revealed the existence of amorphous-like layers at both the top [103]YBCO/STO and STO/bottom [013]YBCO interfaces.<>
Keywords :
Raman spectra; barium compounds; high-temperature superconductors; strontium compounds; superconducting device testing; superconductive tunnelling; superconductor-insulator-superconductor devices; transmission electron microscopy; yttrium compounds; RF magnetron sputtering; Raman scattering; TEM; YBa/sub 2/Cu/sub 3/O-SrTiO/sub 3/-YBa/sub 2/Cu/sub 3/O; [013] orientation; [103] orientation; [103]YBa/sub 2/Cu/sub 3/O/sub y//SrTiO/sub 3//[013]YBa/sub 2/Cu/sub 3/O/sub y/ layered structure; amorphous-like layers; broad gap like structure; conductance peak; cross-sectional observation; electrical properties; facets; tunnel junctions; zero bias voltage; Argon; Electrons; Etching; Sputtering; Substrates; Tunneling; Voltage; Wiring; X-ray diffraction; Yttrium barium copper oxide;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
