© 2011 Published by Elsevier B.V. Selection and/or peer-review under responsibility of the Guest Editors. LaCaBaCu3O7 is a high critical temperature superconductor (HTS) below the Tc = 80 K and its structure is similar to that of YBCO. In this work we study the effect in the irreversibility line and the Curie-Weiss temperature of this superconductor after borate (BO3)3- doping (LaCaBaCu3-x(BO3)xO7-δx=0.2 and 0.3). Interestingly, borate doping enhances the irreversibility line and this effect is probably caused from alteration the arrangement of the oxygen atoms in the crystalline structure. Moreover, the Curie-Weiss temperature (□p) in the normal state increases with doping concentration. Calculated □p for pure LaCaBaCu3O7 is around -98K, this value increases to -75 and 49 K for x=0.2 and 0.3 respectively and indicating transition from antiferromagnetic to ferromagnetic coupling between ions in the structure. This study provides additional data for the magnetic characteristics of doped like-123 crystalline structures with oxyanions.
De Los Santos Valladares, L., Bustamante Dominguez, A., Bellido Quispe, R., Flores Santibañez, W., Albino Aguiar, J., Barnes, C. H. W., & Majima, Y. (2012). The irreversibility line and Curie-Weiss temperature of the superconductor LaCaBaCu<inf>3-X</inf>(BO<inf>3</inf>)<inf>X</inf>with x= 0.2 and 0.3. 354-359. Paper presented at Physics Procedia, . https://doi.org/10.1016/j.phpro.2012.06.244