Reliable 4.8 T trapped magnetic fields in Gd–Ba–Cu–O bulk superconductors using pulsed field magnetization. (29th January 2021)

• Record Type: Journal Article
• Authors: Zhou, Difan; Srpcic, Jan; Huang, Kaiyuan; Ainslie, Mark; Shi, Yunhua; Dennis, Anthony; Boll, Martin; Filipenko, Mykhaylo; Cardwell, David; Durrell, John
• Is Part Of: Superconductor science & technology. Volume 34:Number 3(2021)
• Publication Date: 2021-01-29
• Subjects: bulk superconductors -- pulsed field magnetization -- flux jump; Superconductivity -- Periodicals; Superconductors -- Periodicals; 537.623
• DOI: 10.1088/1361-6668/abd45a
• Languages: English
• ISSNs: 0953-2048

Abstract

Abstract: A robust and reliable in-situ magnetization method is essential for exploiting the outstanding magnetic flux trapping ability of bulk superconductors in practical applications. We report a 4.8 T peak trapped magnetic field, B T, achieved at 30 K in a 36 mm diameter GdBa2 Cu3 O7- δ –Ag bulk superconductor using pulsed field magnetization (PFM). To realize this, we have developed a reliable two-step multi-pulse PFM process based on understanding and exploiting the avalanche-like flux jump phenomenon observed in these materials. The magnitude of the applied pulsed magnetic field ( B a ) necessary to trap 4.8 T was merely 5.29 T, corresponding to a remarkable magnetization efficiency ( B T / B a ) of 90%.