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 Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Synopsis: In order to develop a compact cryogen-free 4.7-T (200 MHz) NMR magnet, we investigated methods of obtaining a homogeneous magnetic field distribution inside REBCO bulks. In this study we successfully fabricated large single-domain annular GdBCO bulk superconductors 60 mm in diameter and up to 60 mm thick. We also fabricated a large EuBCO bulk 60 mm in diameter, and evaluated the performance of these annular bulks in terms of the NMR magnet. It was found that enhancing Jc-B, increasing bulk thickness and employing an Eu element showing low magnetic permeability were effective in increasing the homogeneity of the magnetic field distribution. Furthermore, it was confirmed that a homogeneous area of magnetic distribution was obtained even at a higher field magnetization of 7 T (300 MHz) at 40 K for stacked GdBCO bulk superconductors 60 mm in diameter and 60 mm thick. Finally, several issues relating to further increasing the trapped magnetic field were discussed.

Development of Single-domain Annular REBCO Bulk Superconductors for Compact Cryogen-free NMR