Intrinsic BSCCO Josephson junctions on off-axis substrates

Author

Kawahara, T. ; Ishibashi, T. ; Kaneko, H. ; Sato, K. ; Lee, K. ; Iguchi, I.

Author_Institution

Fac. of Technol., Tokyo Univ. of Agric. & Technol., Japan

Volume

9

Issue

2

fYear

1999

fDate

6/1/1999 12:00:00 AM

Firstpage

4519

Lastpage

4522

Abstract

Anisotropic transport and microwave properties of intrinsic Bi/sub 2/Sr/sub 2/CaCu/sub 2/O/sub x/ (2212) Josephson junctions fabricated on off-axis substrates were studied. The twin-free thin film 2212 Josephson junctions have been prepared by molecular beam epitaxy (MBE) on LaAlO/sub 3/ [001] substrates tilted 6/spl deg/ toward the [110] direction, and were patterned into a line shape along [110] LaAlO/sub 3/ with 20 /spl mu/m in width. We found that the anisotropy parameter /spl gamma/ was increased from 76 to 120 by the annealing at temperature of 320-350/spl deg/C in the MBE chamber. The coherent Josephson radiation from stacked 2212 intrinsic junctions and their modulation under applied magnetic field were observed at frequency f/sub REC/=1.7 GHz by using a nonresonant detection method. These results confirmed the occurrence of the mutual phase locking of the stacked series array of intrinsic junctions along the c-axis.

Keywords

Josephson effect; annealing; bismuth compounds; calcium compounds; electrical resistivity; high-temperature superconductors; microwave generation; molecular beam epitaxial growth; strontium compounds; superconducting arrays; superconducting epitaxial layers; superconducting junction devices; 1.7 GHz; 320 to 350 degC; Bi/sub 2/Sr/sub 2/CaCu/sub 2/O; Bi/sub 2/Sr/sub 2/CaCu/sub 2/O/sub x/; HTSC; LaAlO/sub 3/; LaAlO/sub 3/ [001] substrates; MBE; anisotropic transport properties; anisotropy parameter; annealing; applied magnetic field; coherent Josephson radiation; intrinsic BiSrCaCuO Josephson junctions; line shape; microwave properties; modulation; molecular beam epitaxy; mutual phase locking; nonresonant detection method; off-axis substrates; stacked 2212 intrinsic junctions; stacked series array; twin-free thin film; Anisotropic magnetoresistance; Annealing; Bismuth compounds; Josephson junctions; Molecular beam epitaxial growth; Phased arrays; Shape; Strontium; Substrates; Transistors;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.784030

Filename

784030