Effects of Co doping on magnetic and electrochemical properties of BiFeO3 nanoparticles

Magnetization-magnetic field hysteresis loops of BiFe1−xCoxO3 (x = 0, 0.05, 0.1, 0.2, 0.3) nanoparticles at different temperatures: (a) T = 50 K, (b) T = 100 K, (c) T = 200 K, and (d) T = 300 K.