Electronic Resource
Woodbury, NY
:
American Institute of Physics (AIP)
Applied Physics Letters
59 (1991), S. 1386-1388
ISSN:
1077-3118
Source:
AIP Digital Archive
Topics:
Physics
Notes:
Co-doped YBa2Cu3O7−s samples prepared under identical conditions have been investigated by magnetization measurements as a function of temperature and field exhibiting pronounced M(H) hysteresis loops indicative of large flux pinning even as T approaches Tc. It is believed that the flux pinning arises due to the preferential substitution of Co in Cu(1) site, which acts as pinning center. A critical current density, Jc, of ∼106 A/cm2 is deduced from M(H) data at 13 K in a field of 1.5 kOe for YBa2(Cu1−xCox)3O7−s at x=0.01, which is nearly five times larger than the Jc of the pristine 1-2-3. The variation of Jc with atomic percent of Co-substitution in 1-2-3 shows a structural transition (orthorhombic to tetragonal) at 4 at. % of Co indicating structural dependence on Jc.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.106383
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