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Noise properties of...
Noise properties of HTS flux transformers fabricated by chemical-mechanical polishing
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- Chukharkin Leonidovich, Maxim, 1980 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Kalaboukhov, Alexei, 1975 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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Schneiderman, Justin, 1979 (author)
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- Öisjöen, Fredrik, 1982 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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Snigirev, Oleg, 1944 (author)
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- Winkler, Dag, 1957 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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(creator_code:org_t)
- 2011
- 2011
- English.
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In: European conference on applied superconductivity.
- Related links:
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https://research.cha...
Abstract
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- We present on fabrication and noise properties of high-temperature superconducting (HTS) thin-film integrated multilayer flux transformers fabricated using planarization of YBCO films by chemical-mechanical polishing (CMP). The polishing allows fabrication of very shallow slope edges (less than 5°) in the YBa2Cu3O7, that makes it possible to avoid formation of grain boundary junctions in crossovers and obtain very high critical current densities in the top electrode of about 2•106 A/cm2. The same planarization process is used to create interconnections between top and bottom superconducting electrodes through the SrTiO3/PrBa2Cu3O7/SrTiO3 insulating layer. HTS multilayer flip-chip flux transformer with 8x8 mm2 pickup loop and 20-turn input coil was fabricated and coupled to a bicrystal dc SQUID in a flip-chip configuration. We measured magnetic field gain of 1.2 nT/Ф0 and magnetic flux noise of the magnetometer 10 µФ0/√Hz at 1 kHz, which corresponds to magnetic field noise of 12 ft/√Hz. FLUX NOISE AT LOW FREQUENCIES! The work is supported by European FP7 project "MEGMRI" under contract number 200859.
Subject headings
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
Publication and Content Type
- kon (subject category)
- vet (subject category)
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