High frequency microwave emission from BSCCO intrinsic junctions

Author

Wang, W. ; Lee, K. ; Iguchi, I. ; Hirata, K. ; Mochiku, T.

Author_Institution

Dept. of Appl. Phys., Tokyo Inst. of Technol., Japan

Volume

9

Issue

2

fYear

1999

fDate

6/1/1999 12:00:00 AM

Firstpage

4523

Lastpage

4526

Abstract

We studied the microwave emission properties of very thin mesa structures of high quality Bi/sub 2/Sr/sub 2/CaCu/sub 2/O/sub 8/ (BSCCO) single crystals grown by the traveling solvent floating zone technique. To increase the anisotropy of crystal, the samples were annealed at 400-600/spl deg/C for 1-20 hrs. The mesa height was 15-45 nm, for which 10-30 resistive hysteresis branches in the I-V characteristics might be expected. The emission power from the stack of the intrinsic junctions was measured by a superheterodyne detection technique at receiving frequencies f/sub rec/=12 GHz, 36 GHz and 47 GHz. For the first time, we observed two kinds of emission modes, one may be explained by microwave emission from phase-locked Josephson junctions, and the other may be caused by the injection of quasiparticle current into the layered intrinsic junction system.

Keywords

Josephson effect; annealing; bismuth compounds; calcium compounds; high-temperature superconductors; microwave generation; quasiparticles; strontium compounds; superconducting junction devices; 12 GHz; 36 GHz; 400 to 600 degC; 47 GHz; Bi/sub 2/Sr/sub 2/CaCu/sub 2/O/sub 8/; BiSrCaCuO intrinsic junctions; HTSC; I-V characteristics; annealing; emission modes; high frequency microwave emission; high quality Bi/sub 2/Sr/sub 2/CaCu/sub 2/O/sub 8/; mesa height; phase-locked Josephson junctions; quasiparticle current; resistive hysteresis branches; single crystals; superheterodyne detection technique; traveling solvent floating zone technique; very thin mesa structures; Anisotropic magnetoresistance; Annealing; Bismuth compounds; Crystals; Frequency; Hysteresis; Microwave theory and techniques; Power measurement; Solvents; Strontium;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.784031

Filename

784031