Preparation of thin-film YBaCuO quantum interference devices with a lift-off technique

Häuser, B.; Diegel, M.; Rogalla, Horst

doi:10.1063/1.99303

Cited by 58 publications

(6 citation statements)

References 3 publications

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“…Due to its importance for superconducting electronic applications much effort has been spent on the preparation and study of high-To superconducting thin film Josephson junctions. The first high-Tc junction was made at IBM using thin films of YBa2CuaOx (YBCO) [ 1 ], rapidly being followed by a number of others [2][3][4]. Shortly afterwards also junctions in TBCCO [5] and BSCCO [6] materials were fabricated.…”

Section: Introductionmentioning

confidence: 99%

Controlled preparation of all high-Tc SNS-type edge junctions and DC SQUIDs

Gao

Aarnink

Gerritsma

et al. 1990

Physica C: Superconductivity

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High-T c SNS-type Josephson junctions and DC SQUIDs were successfully fabricated using hetero-epitaxially grown multilayers of YBa2Cu3Ox and PrBa2Cu3Ox. These layers are c-axis oriented and hence edges of the muir[layers give rise to a current flow in the ab-plane between the electrodes of a Josephson junction. The necessary structuring was done by Ar ion beam etching. The individual junctions exhibit a supercurrent up to 80 K. The IcR,-product of these junctions usually has a lower limit of 8 mV at 4.2 K. Voltage modulation of the first DC SQUIDs can be observed up to 66 K. Details on the fabrication and measurements are presented.

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Section: Introductionmentioning

confidence: 99%

Controlled preparation of all high-Tc SNS-type edge junctions and DC SQUIDs

Gao

Aarnink

Gerritsma

et al. 1990

Physica C: Superconductivity

Self Cite

164

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“…In order to apply these thin films to e.g. superconducting electronics [3,4], the eIectrical film properties have to be optimized with regard to a high transition temperature as well as a high critical current. Furthermore, the lithographic treatment and multilayer techniques require flat surfaces and simple structuring possibilities without degradation of the film properties.…”

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confidence: 99%

C-Axis oriented growth of magnetron sputtered YBaCuO thin films on MgO substrates

et al. 1988

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Highly textured YBaCuO thin films were sputtered on MgO (100)-oriented single crystal substrates at ambient temperature followed by an anneal in oxygen for 1 h at temperatures up to 920~ X-ray diffractograms of the highly textured films indicate an orientation of the e-axis of the YBaCuO lattice perpendicular to the substrate surface. There are strong indications that the oriented caxis growth is due to a CuO self-flux effect. Auger measurements reveal a copper diffusion profile into the substrate down to a depth of more than 400 rim.

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“…Josephson effect and DC SQUID behaviour have been observed in high Tc superconductors by various groups. DC SQUID based on bulk (Kataria et al 1989), thick (Lin et al 1989) and thin films (Koch et al 1987(Koch et al , 1989Nakane et al 1987;Hauser et al 1988) have been made using intergranular weak links in small constriction of the sample. RF SQUID behaviour have been demonstrated in bulk sample of Y-Ba-Cu-O at 77K (CoMough et al 1987;Pegrum et al 1988;Tichy et al 1988).…”

Section: Introductionmentioning

confidence: 99%

Josephson effects and dc SQUID behaviour in break junction of Y-Ba-Cu-O at 77 K

et al. 1991

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Break junctions of Y-Ba-Cu-O superconductor were realized by creating fresh crack in the bar shape bulk samples mounted in a specially designed probe kept in the liquid nitrogen bath. While the bulk sample was kept static, a sharp tip of a shaft was moved downward from the outside of the dewar in order to break the sample. It was possible to change the critical current of the break junctions by adjusting pressure on the tip of the shaft. The effects of magnetic field and microwave power on the I-V characteristic of the junction were studied. The junction was found to show periodic V-B behaviour and the microwave-induced Shapiro steps were clearly observed at 77 K. The flux noise spectrum of the junction was also studied.

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Preparation of thin-film YBaCuO quantum interference devices with a lift-off technique

Cited by 58 publications

References 3 publications

Controlled preparation of all high-Tc SNS-type edge junctions and DC SQUIDs

Controlled preparation of all high-Tc SNS-type edge junctions and DC SQUIDs

C-Axis oriented growth of magnetron sputtered YBaCuO thin films on MgO substrates

Josephson effects and dc SQUID behaviour in break junction of Y-Ba-Cu-O at 77 K

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