Properties of lift-off structured high Tc microbridges

B. Hauser; B. Klopman; D. Blank; H. Rogalla

doi:10.1109/20.92437

Properties of lift-off structured high Tc microbridges

B. Hauser
, B. Klopman
, D. Blank
, H. Rogalla

Research output: Contribution to journal › Conference article › Academic

5 Citations (Scopus)

149 Downloads (Pure)

Abstract

Microbridges and DC SQUIDs (superconducting quantum interference devices) were fabricated, using a lift-off technique, from RF sputtered YBaCuO films on MgO single-crystal substrates. Microwave measurements at 9 GHz on microbridges and the magnetic-field dependence of their critical current reveal wide bridge behaviour up to temperatures near the maximum operating temperature of the bridge. Mostly, a linear dependence of the critical current on the temperature is found, which is connected with high intrinsic 1/f noise if the bridge is constant-current-biased slightly above the critical current. In some bridges and DC SQUIDs, regimes with a temperature dependence proportional to (1-T/Tc)1.5 are found. In this case the 1/f noise level is much smaller and SQUID modulation can be followed to about 65 K

Original language	English
Pages (from-to)	919-922
Journal	IEEE transactions on magnetics
Volume	25
Issue number	2
DOIs	https://doi.org/10.1109/20.92437
Publication status	Published - 1989
Event	13th Applied Superconductivity Conference, ASC 1988 - San Francisco, United States Duration: 21 Aug 1988 → 25 Aug 1988 Conference number: 13 https://inspirehep.net/conferences/966846

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title = "Properties of lift-off structured high Tc microbridges",

abstract = "Microbridges and DC SQUIDs (superconducting quantum interference devices) were fabricated, using a lift-off technique, from RF sputtered YBaCuO films on MgO single-crystal substrates. Microwave measurements at 9 GHz on microbridges and the magnetic-field dependence of their critical current reveal wide bridge behaviour up to temperatures near the maximum operating temperature of the bridge. Mostly, a linear dependence of the critical current on the temperature is found, which is connected with high intrinsic 1/f noise if the bridge is constant-current-biased slightly above the critical current. In some bridges and DC SQUIDs, regimes with a temperature dependence proportional to (1-T/Tc)1.5 are found. In this case the 1/f noise level is much smaller and SQUID modulation can be followed to about 65 K",

author = "B. Hauser and B. Klopman and D. Blank and H. Rogalla",

year = "1989",

doi = "10.1109/20.92437",

language = "English",

volume = "25",

pages = "919--922",

journal = "IEEE transactions on magnetics",

issn = "0018-9464",

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note = "13th Applied Superconductivity Conference, ASC 1988, ASC 1988 ; Conference date: 21-08-1988 Through 25-08-1988",

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TY - JOUR

T1 - Properties of lift-off structured high Tc microbridges

AU - Hauser, B.

AU - Klopman, B.

AU - Blank, D.

AU - Rogalla, H.

N1 - Conference code: 13

PY - 1989

Y1 - 1989

N2 - Microbridges and DC SQUIDs (superconducting quantum interference devices) were fabricated, using a lift-off technique, from RF sputtered YBaCuO films on MgO single-crystal substrates. Microwave measurements at 9 GHz on microbridges and the magnetic-field dependence of their critical current reveal wide bridge behaviour up to temperatures near the maximum operating temperature of the bridge. Mostly, a linear dependence of the critical current on the temperature is found, which is connected with high intrinsic 1/f noise if the bridge is constant-current-biased slightly above the critical current. In some bridges and DC SQUIDs, regimes with a temperature dependence proportional to (1-T/Tc)1.5 are found. In this case the 1/f noise level is much smaller and SQUID modulation can be followed to about 65 K

AB - Microbridges and DC SQUIDs (superconducting quantum interference devices) were fabricated, using a lift-off technique, from RF sputtered YBaCuO films on MgO single-crystal substrates. Microwave measurements at 9 GHz on microbridges and the magnetic-field dependence of their critical current reveal wide bridge behaviour up to temperatures near the maximum operating temperature of the bridge. Mostly, a linear dependence of the critical current on the temperature is found, which is connected with high intrinsic 1/f noise if the bridge is constant-current-biased slightly above the critical current. In some bridges and DC SQUIDs, regimes with a temperature dependence proportional to (1-T/Tc)1.5 are found. In this case the 1/f noise level is much smaller and SQUID modulation can be followed to about 65 K

U2 - 10.1109/20.92437

DO - 10.1109/20.92437

M3 - Conference article

SN - 0018-9464

VL - 25

SP - 919

EP - 922

JO - IEEE transactions on magnetics

JF - IEEE transactions on magnetics

IS - 2

T2 - 13th Applied Superconductivity Conference, ASC 1988

Y2 - 21 August 1988 through 25 August 1988

ER -

Properties of lift-off structured high Tc microbridges

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