English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

Vanadium is an elemental type-II superconductor which has a puresuperconducting phase, a vortex phase, and a non-superconducting phase. Wedesigned and carried out a low-budget experiment in our undergraduate physicslab to measure the magnetic field a close distance from the surface of a pureVanadium disk sample isothermally with a Hall sensor across a range ofdifferent temperatures and external magnetic fields. We then used thesemeasurements to compute the superconducting phase diagram of Vanadium. Aftercompleting measurements at eight temperatures ranging from 2.6K to 5K andmagnetic fields ranging from -0.2T to 0.2T, we were able to detect the Meissnerphase (clearly), and a vortex phase (less clearly). Using the graphs of thehall bar magnetic field versus external magnetic field, we were able to derivea rough estimate for the upper critical field and the lower critical field ofVanadium at the eight temperatures wherein we conducted measurements. Theresults are in general accord with the phase diagram of Vanadium found in theliterature, except that the critical temperature appears to be less than 5.43Kand 5.13K (about 4.8K). Further, we observed critical fields lower than thosefound in the literature. We hypothesize this is due mostly to impurities in ourVanadium sample (purchased through Amazon.com), which would reduce the measuredcritical temperature below that of pure Vanadium, consistent with our results.

Hall Sensor Based Measurements of the Magnetic Phase Diagram of Superconducting Vanadium