Structural, physical, optical, and magnetic properties of borate–barium–titanate–lithium glasses: role of Er2O3A. S. Abouhaswa, E. A. Rabiea, M. H. Nasr and H. M. AbomostafaEur. Phys. J. Plus, 139 1 (2024) 23DOI: https://doi.org/10.1140/epjp/s13360-023-04814-4