Effects of Lu Doping on the Magnetic Behavior of YBCO Superconductors Prepared by MPMG Method

Uysal E., ÖZTÜRK A., Kutuk S., Celebi S.

JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM, vol.27, no.9, pp.1997-2003, 2014 (SCI-Expanded) identifier identifier


We report on magnetic behavior of Y Lu1-x Ba-x (2) Ca (3) O (7-delta) (x= 0, 0.5) samples synthesized by a modified melt powder melt growth (MPMG) method at three different sintering temperatures (920, 930, 940 C-a similar to). Isothermal magnetization measurements were done as a function of magnetic field at 20 and 77 K upon zero-field cooling (ZFC) process. The critical current densities as a function of magnetic field have been estimated from M-H hysteresis loop. Partial Lu substitution for Y on YBCO superconductors improved significantly the bulk critical current density, which is confirmed by field-cooled magnetization and AC susceptibility measurements. Magnetic relaxation measurement has been carried out in remanent magnetization regime. AC susceptibility measurements have been performed as a function of temperature to determine the transition temperature.