Thickness dependence of the current density distribution in superconducting films

Laviano, Francesco; Botta, D.; Gerbaldo, Roberto; Ghigo, Gianluca; Gozzelino, Laura; Gianni, L.; Zannella, S.; Mezzetti, Enrica

doi:10.1016/j.physc.2003.11.045

Cited by 14 publications

(3 citation statements)

References 14 publications

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“…It was shown, however, that vortex bending can permit the motion of the vortices for currents lower than that corresponding to the destruction of the flux free region. 41 This phenomenon has hampered the fabrication of CCs with a large thickness and a large critical current for some time and was overcome only by the introduction in the superconducting films of nano-particles modifying vortex bending. 42 The vortex dynamics described here does not take this phenomenon into account.…”

Section: Modelsmentioning

confidence: 99%

The role of a-axis grains in the transition to the normal state of YBa2Cu3O7−δ films and of 2G-coated conductors when induced by high electrical current densities

Bernstein

Ferro

Harnois

et al. 2014

Journal of Applied Physics

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Section: Modelsmentioning

confidence: 99%

The role of a-axis grains in the transition to the normal state of YBa2Cu3O7−δ films and of 2G-coated conductors when induced by high electrical current densities

Bernstein

Ferro

Harnois

et al. 2014

Journal of Applied Physics

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“…The YBCO thickness of 300 nm was chosen because it experimentally corresponds to a maximum of [18]. The of the as-grown samples is about 89 K, at the transition onset, and the transition width, , is less than half a Kelvin degree.…”

Section: B Samplesmentioning

confidence: 99%

THz Detection Above 77 K in YBCO Films Patterned by Heavy-Ion Lithography

et al. 2010

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Research and application of THz technology, pursued all over the last century, are currently focused either on high-performance sources and detectors or on low-cost and rugged devices that are suitable for widespread use. Besides semiconductors, high temperature superconductors are good candidates for next generation superconducting bolometers. We employ the High Energy Heavy Ion (HEHI) lithography for modulating the local structural and electrical properties of high temperature superconducting YBa 2 Cu 3 O 7 (YBCO) films in a functional way. In this report, measurements of the photoresponse of a prototype device to electromagnetic radiation in the far infrared band (THz region) are presented. It is demonstrated that HEHI lithography is an effective tool to enhance the absorption band of the YBCO film in the infrared spectrum, enabling the THz detection of YBCO sensors, in the superconducting state and above the liquid nitrogen temperature.

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“…The critical current density sets over 3 ϫ 10 11 A m −2 at T = 4.2 K, for the chosen film thickness of 300 nm ͑T c onset is around 88.5 K͒. 10 Strip-shaped YBCO samples ͑width ranging from 20 to 1000 m͒, obtained by UV photolithography and wet etching, were irradiated with 0.25 GeV Au ions at the INFN Tandem accelerator facilities. The HEHI beam was collimated by means of laser-cut stainless-steel masks ͑thickness of 150 m͒, with one or more micrometric slits ͑lateral aperture ranging from 30 to 300 m͒, in order to produce a microscale modulated region inside the virgin part of the superconductor, as depicted in the scheme of timated by means of SRIM simulations͒.…”

mentioning

confidence: 99%

Local magnetic field detector made by microscale ion irradiation on high temperature superconducting films

Laviano

Gerbaldo

Ghigo

et al. 2006

Applied Physics Letters

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Microscale modulations of the crystal structure in a continuous superconductor turn out to be effective for the spatial focusing of the energy dissipation induced by unpinned vortices. High-energy heavy-ion irradiation allowed the authors to finely control the defect density in order to study the properties of interfaces between pristine and irradiated parts of high temperature superconductors. In particular, strip-shaped samples were locally irradiated to create microscale modulations across their whole width. Magneto-optical imaging under electrical transport and magnetoresistive measurements imply that such tailored modulation in a superconducting strip can be exploited to develop a fully planar, single-compound, local magnetoresistive sensor.

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Thickness dependence of the current density distribution in superconducting films

Cited by 14 publications

References 14 publications

The role of a-axis grains in the transition to the normal state of YBa2Cu3O7−δ films and of 2G-coated conductors when induced by high electrical current densities

The role of a-axis grains in the transition to the normal state of YBa2Cu3O7−δ films and of 2G-coated conductors when induced by high electrical current densities

THz Detection Above 77 K in YBCO Films Patterned by Heavy-Ion Lithography

Local magnetic field detector made by microscale ion irradiation on high temperature superconducting films

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