Figure 4From: The effects of surface spin on magnetic properties of weak magnetic ZnLa0.02Fe1.98O4 nanoparticlesThe magnetization measured in zero field-cooled and field-cooled modes. The magnetization measured in zero field-cooled (MZFC) and field-cooled (MFC) modes from 20 to 380 K in a field of 200 Oe for the samples UD700 (a) and UD1000 (b).Back to article page