Anomalous magnetisation of YBCO and BSCCO single crystals

Author

Yang, G. ; Abell, J.S. ; Gough, C.E.

Author_Institution

Birmingham Univ., UK

Volume

3

Issue

1

fYear

1993

fDate

3/1/1993 12:00:00 AM

Firstpage

1671

Lastpage

1674

Abstract

Anomalous magnetization characteristics of YBa/sub 2/Cu/sub 3/O/sub y/ and Bi/sub 2/Sr/sub 2/CaCu/sub 2/O/sub y/ single crystals and their oxygen vacancy dependences are reported. In these crystals the magnetization exhibits a maximum as a function of the applied field. Significant differences in the anomalous magnetization of the YBCO and BSCCO crystals indicate different origins. Several possible explanations are compared with experimental results. Two kinds of pinning centers with different T/sub c/´s could explain the anomalous magnetization of YBCO, while 2-D pancake vortices matching a 2-D defect structure may account for the BSCCO results.<>

Keywords

barium compounds; bismuth compounds; calcium compounds; critical current density (superconductivity); flux pinning; high-temperature superconductors; magnetic hysteresis; magnetisation; strontium compounds; yttrium compounds; 2D defect structure; 2D pancake vortices; BSCCO single crystals; Bi/sub 2/Sr/sub 2/CaCu/sub 2/O/sub y/; O vacancy; YBCO; YBa/sub 2/Cu/sub 3/O/sub y/; anomalous magnetization; critical current density; high temperature superconductors; magnetic hysteresis; pinning centers; Anisotropic magnetoresistance; Bismuth compounds; Crystal microstructure; Current measurement; Magnetic field measurement; Magnetic hysteresis; Magnetization; Superconductivity; Temperature; Yttrium barium copper oxide;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.233916

Filename

233916