Magnetic imaging of YBCO coated conductors by Hall probes

Grimaldi, Gaia; Bauer, Markus; Kinder, H.; Prusseit, W.; Gambardella, U.; Pace, S.

doi:10.1016/s0921-4534(02)00958-9

Cited by 11 publications

(7 citation statements)

References 8 publications

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“…Coated conductors based on nonmagnetic steel tape, where the buffer layer is artificially in plane aligned by ion-beam-assisted deposition (IBAD) [3] or inclined substrate deposition (ISD) [4], can be evaluated by an array of Hall sensors [5]. The chip containing a line of seven Hall probes (each 50 × 50 µm 2 ) is placed across the tape width.…”

Section: Non-magnetic Tapementioning

confidence: 99%

Reel-to-reel critical current measurement of coated conductors

Furtner¹,

Nemetschek²,

Semerad³

et al. 2004

Supercond. Sci. Technol.

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We introduce an apparatus for non-destructive, contact free, reel-to-reel critical current measurement of coated conductor tape. Up to 100 m of tape can be passed in front of a sensor head for the measurement in liquid nitrogen. The tape is transferred and characterized at a speed of 10 mm s −1 . After the liquid nitrogen passage it is actively heated up to room temperature to avoid moisture condensation. Two different sensors in the probe head can be optionally activated: a linear Hall probe array in a field coil and an ac-measurement coil picking up third harmonic signals from the film. Once calibrated by transport measurement this arrangement enables characterization of HTS films on magnetic as well as on non-magnetic metal tape substrates. In a 10 mm wide coated conductor, up to 400 A of critical current can be measured.

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Section: Non-magnetic Tapementioning

confidence: 99%

Reel-to-reel critical current measurement of coated conductors

Furtner¹,

Nemetschek²,

Semerad³

et al. 2004

Supercond. Sci. Technol.

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“…• The Hall probe array technique (HPA) [13,14,15,16,17]: An assembly of several Hall effect probes allows to measure the magnetic field simultaneously at several points. This technique is very fast but the spatial resolution is very mediocre because the sensors are separated by about 0.6 mm.…”

Section: Introductionmentioning

confidence: 99%

Field mapping measurements to determine spatial and field dependence of critical current density in YBCO tapes

Leclerc¹,

Berger²,

Douine³

et al. 2013

Physica C: Superconductivity

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International audienceIn this paper a measurement method that allows the determination of the critical current density of superconducting tape from field mapping measurements is presented. This contact-free method allows obtaining characteristics of the superconductor as a function of the position and of the applied flux density. With some modifications, this technique can be used for reel-to-reel measurements. The determination of the critical current density is based on an inverse calculation. This involves calculating the current distribution in the tape from magnetic measurements. An YBaCuO tape has been characterized at 77 K. A defect in this superconductor has been identified. Various tests were carried out to check the efficiency of the method. The inverse calculation was tested theoretically and experimentally. Comparison with a transport current measurement was also performed

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“…It is widely used to estimate the current density distribution or the magnetic properties of superconducting materials [2]- [4]. Many measurement methods using a Hall sensor have been reported [5], [6]. To realize a highly functional measuring system with real time and high spatial resolution, and to estimate the properties of superconductor film with a complex structure or pattern, it is very important to develop a novel Hall sensor array with small size, planar structure and two-or threeaxis.…”

Section: Introductionmentioning

confidence: 99%

Fabrication and Application of Two-Axis Hall Sensor Array Using ELO Film Bonding Technology

Koh

Kim

Hohkawa

2007

IEEE Trans. Appl. Supercond.

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In this paper, we report a basic study on the development of a two-axis Hall sensor array using epitaxial lift-off (ELO) film bonding technology. We developed a novel Hall sensor array fabricated on a Si substrate that can directly measure axial and radial magnetic field components (Bx and Bz) simultaneously. We investigated conditions of basic fabrication process and fabricated a basic test device. We also estimated basic characteristics of the Hall sensor and measured the DC self-magnetic field profiles of a YBCO strip. The results clarified that the ELO film bonding technology is suitable for fabricating two-axis Hall sensor array.

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Magnetic imaging of YBCO coated conductors by Hall probes

Cited by 11 publications

References 8 publications

Reel-to-reel critical current measurement of coated conductors

Reel-to-reel critical current measurement of coated conductors

Field mapping measurements to determine spatial and field dependence of critical current density in YBCO tapes

Fabrication and Application of Two-Axis Hall Sensor Array Using ELO Film Bonding Technology

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