Table 4.

Comparison between the magnetic properties of the researchers work and reported research work (all at 300 k temperature).

Method	Precursor	Products	Ms (emu/g)	Hc Oe	Bt	Ref
Micro emulsion	FeSO4.nH2O	Fe3O4	18.3	–	–	22
Microemulsion	FeCl2.nH2O	Fe3O4	30	60	50 k	35
Hydrothermal	FeCl2.nH2O	Fe3O4	56	108	–	36
Microemulsion	FeSO4.7H2O	γFe2O3	37	–	–	37
Microemulsion	FeSO4.7H2O	γFe2O3	50	32	92	38
One-step perception	Fe(CO)5	Fe3 O4	12	117	–	39
Carbon reduction	Fe2Cl6	Fe3O4	34	40	–	40
Carbon reduction	FeSO4.7H2O	Fe3O4@SiO4	46	21	–	41
This work	Fe(NO3)3.9H2O	Fe3O4	213	173	304