Dataset for: "Mapping the flux penetration profile in a 2G-HTS tape at the microscopic scale: deviations from a classical critical state model"

Dataset for: "Mapping the flux penetration profile in a 2G-HTS tape at the microscopic scale: deviations from a classical critical state model"

Datasets underpinning the 6 Figures for "Mapping the flux penetration profile in a 2G-HTS tape at the microscopic scale: deviations from a classical critical state model" in Superconductor Science and Technology. The data files consist of .txt files for each figure organised in individual folders and presented in labelled columns (tab delimited). The data was acquired by scanning Hall microscopy (SHM) in two operation modes: the 'local' magnetometry mode where ‘local’ magnetic induction is measured, and the rapid 'flying' mode that makes a rapid 2D scan of the maximum field of view. The data files consist of individual graph curves and SHM images. A critical state model was used to fit the experimental data and estimate the superconducting critical temperature at different temperatures.

Keywords:
2G-HTS tape, superconductivity, scanning Hall microscopy, superconducting vortices
Subjects:
Superconductivity, magnetism and quantum fluids

Cite this dataset as:
Marchiori Pereira, E., Bending, S., 2019. Dataset for: "Mapping the flux penetration profile in a 2G-HTS tape at the microscopic scale: deviations from a classical critical state model". University of Bath Research Data Archive. https://doi.org/10.15125/BATH-00604.

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Data

Data_Archive.zip
application/zip (2MB)
Creative Commons: Attribution 4.0

Creators

Simon Bending
University of Bath

Documentation

Data collection method:

The primary datasets are scanning Hall microscopy (SHM) used to directly image the magnetic field component perpendicular to the surface of a 10 × 14 mm2 piece of 2G-HTS tape at different temperatures ranging from 88 K down to 65 K. The microscope used is a modified commercial low temperature scanning tunnelling microscope (STM) where the tunnelling tip has been replaced by a custom-fabricated GaAs chip. The Hall probe is patterned in the two-dimensional (2D) electron gas of a GaAs/AlGaAs heterostructure, defined by the intersection of two 0.8 μm wide wires situated ∼5 μm from the Au-coated corner of a deep mesa etch that acts as an integrated STM tip. The Hall probe is mounted at an angle of 1°−2° with respect to the sample plane, with the STM tip being the closest point to the sample surface [10]. The Hall probe with ∼0.8 μm spatial resolution and ∼5 mG Hz−1/2 minimum detectable field was approached at a point approximately 1 mm from one of the long edges of the tape and then retracted ∼1 μm for fast data collection. Two operation modes were used; a rapid ‘flying mode’ where the Hall sensor makes a rapid 2D scan of the maximum field of view, and a ‘local’ magnetometry mode whereby the sensor is parked above a desired location and the ‘local’ magnetic induction measured while sweeping an external magnetic field perpendicular to the plane of the sample. By systematically acquiring SHM images at regularly spaced points on a magnetic field cycle starting from the zero field-cooled state, a spatial map can be made of the critical state established around a hysteresis loop.

Data processing and preparation activities:

The SHM image data in the archive are raw as-captured data without any post-processing. The SHM data plotted are scaled by the values stated at the figure captions in the published paper.

Technical details and requirements:

SHM image datasets are formatted as the magnetic induction in Gauss measured at each point on a 64 × 64 array of pixel positions. At the measurement temperatures of 83 K, 77 K and 65 K this corresponds to a scan range of 18 µm×18 µm, 16 µm×16 µm and 14 µm×14 µm, respectively.

Documentation Files

README.txt
text/plain (3kB)

Funders

Engineering and Physical Sciences Research Council (EPSRC)
https://doi.org/10.13039/501100000266

Generation, Imaging and Control of Novel Coherent Electronic States
EP/J010626/1

European Cooperation in Science and Technology (COST)
https://doi.org/10.13039/501100000921

Nanoscale Superconductivity: Novel Functionalities through Optimized Confinement of Condensate and Fields
Action MP-1201

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
https://doi.org/10.13039/501100002322

Ciência sem Fronteiras
0611-14-0

Publication details

Publication date: 15 January 2019
by: University of Bath

Version: 1

DOI: https://doi.org/10.15125/BATH-00604

URL for this record: https://researchdata.bath.ac.uk/id/eprint/604

Related articles

Marchiori, E. and Bending, S. J, 2019. Mapping the flux penetration profile in a 2G-HTS tape at the microscopic scale: deviations from a classical critical state model. Superconductor Science and Technology, 32(2), p.025009. Available from: https://doi.org/10.1088/1361-6668/aaf2f5.

Contact information

Please contact the Research Data Service in the first instance for all matters concerning this item.

Departments:

Faculty of Science
Physics

Research Centres & Institutes
Centre for Nanoscience and Nanotechnology