Title :
Magnetisation measurements on melt-textured YBa2Cu3 O7-δ
Author :
Laverty, J.R. ; Shen, Z.X. ; Alford, N. McN ; Button, T.W. ; Caplin, A.D. ; Cassidy, S.M. ; McCartney, D.G. ; Pollard, R.J.
Author_Institution :
Blackett Lab., Imperial Coll., London, UK
fDate :
3/1/1991 12:00:00 AM
Abstract :
Quasi-single-crystal specimens were grown from rods of bulk YBa 2Cu3O7-δ by a-melt-textured (MT) growth process. The material´s magnetization was highly anisotropic, which supports the microstructural picture. While M-H data show that there is a high bulk critical current density, the flux creep behavior indicates that pinning in MT material differs little from that in single crystals or grains of sintered material. The anomalous magnetization reported by M. Daeumling et al. (1990) was observed in only one of three samples taken from the same rod
Keywords :
barium compounds; critical current density (superconductivity); flux creep; flux pinning; high-temperature superconductors; magnetisation; yttrium compounds; anisotropic; flux creep behavior; grains; high bulk critical current density; high temperature superconductor; magnetization; melt-textured YBa2Cu3O7-δ; microstructural picture; pinning; single crystals; sintered material; Creep; Critical current density; Crystal microstructure; Crystalline materials; Current measurement; Magnetic field measurement; Magnetic materials; Magnetization; Pulse measurements; Temperature;
Journal_Title :
Magnetics, IEEE Transactions on
