Synthesis, structural, electrical and magnetic studies of La0.5Ca0.45−xSrxBa0.05MnO3

► The effect of substitution of Sr2+ and Ba2+ for Ca2+ on structural, transport and magnetization behavior is studied. ► The magnetization of compounds does not reveal any AFM behavior although charge ordering is revealed by x=0.1. ► The simultaneous orbital ordering coexisting with the dominant ferromagnetic ordering in x=0.1 compound is revealed. ► The magnetic hysteresis reveals hardening with the decrease of temperature. ► In the high temperature range, the conduction by variable range hopping is favoured.