Table 1
Average crystal sizes from XRD, spinel lattice parameteracalculated from XRD spectra, the specific magnetization (Ms), remnant magnetization (Mr), the ratio of the ratio of remnant magnetization to bulk saturation magnetization (Mr/Ms), and coercive forces (Hc) of the MgFe2O4/PVP composite samples calcined in air at 500, 600, 700, and 800 °C for 2 h
MgFe2O4sample	Average crystallite size from XRD (nm)	Spinel lattice parametersa(nm)	Msat 10 kOe (emu/g)	Mr(emu/g)	Mr/Ms	Hc(Oe)
Calcined at 500 °C	15 ± 4	0.8372 ± 0.0007	17.0	0.6	0.035	35.8
Calcined at 600 °C	17 ± 1	0.8362 ± 0.0012	20.7	0.8	0.040	37.6
Calcined at 700 °C	23 ± 2	0.8353 ± 0.0011	25.7	2.4	0.095	71.2
Calcined at 800 °C	24 ± 3	0.8346 ± 0.0030	31.1	4.7	0.151	98.9

Maensiri et al. Nanoscale Research Letters 2008 4:221   doi:10.1186/1556-276X-4-221