Fig. 15. (a) Field cooling (FC) and zero field cooling (ZFC) plots for Co3O4@RGO composites obtained at field 100 Oe. The inset plot indicates the low temperature regime investigated at 20 Oe, 100 Oe, 1000 Oe and 5000 Oe. (b) The χpT versus T and ∂(χpT)/∂T versus T plot: χp is given by χ − χ0 (where χ0 = 7.08 × 10−6 emu g−1 Oe−1), and (c) χ−1versus T plot for the Co3O4@RGO composite. Reproduced with permission from ref. 120, copyright 2019, Royal Society of Chemistry.
