Jc–B characteristics for bulk single domain YBCO superconductors

Autor:	Ling Xiao, H.T. Ren, Y.X. Chen, M.H. Zheng, Yulei Jiao
Rok vydání:	2003
Předmět:	Superconductivity Materials science Field (physics) Condensed matter physics Peak effect Phase (matter) Energy Engineering and Power Technology Critical current Electrical and Electronic Engineering Single domain Condensed Matter Physics Electronic Optical and Magnetic Materials
Zdroj:	Physica C: Superconductivity. 386:266-270
ISSN:	0921-4534
DOI:	10.1016/s0921-4534(02)02165-2
Popis:	We have studied the dependence of the magnetic critical current densities ( J c ) on the applied field for the samples taken from various positions of a single domain YBCO disk. For most of the measured samples the J c – B curves exhibited the peak effect at field of around 0.8 T, and the highest J c value at 1 T and 77 K was found in the position of about 4.5 mm depth away from the surface of the disk. For various positions the features of J c ( B ) curves were different. It is suggested that the peak effect is attributed to the field induced pinning of weak superconducting regions due to very wide superconducting transition as well as the distributions of the second phase particles. For the bulk sample the J c ( B ) performance is inhomogeneous in the entire body.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::e06c71fd03621775a2b541ac6e64f983 https://doi.org/10.1016/s0921-4534(02)02165-2 Zobrazit plný text záznamu Full Text from ScienceDirect