The 1D chain-like α-Fe2O3 nanostructures were synthesized using a facile solvothermal method followed by
subsequent annealing in air at 450 °C for two hours. We have investigated the microstructure and magnetic
properties of the samples in detail. Field emission scanning electron microscopy revealed the formation of 1D
chain-like morphology of α-Fe2O3 nanostructures. The presence of the pure hematite phase in all samples was
confirmed by X-ray diffraction (XRD). Further, results obtained from Raman and FT-IR spectra are consistent
with XRD outcomes. The magnetic studies (M-H curves) of samples exhibited a wide range of properties.
The S1 and S5 samples exhibit large coercivity (HC) values of 878 Oe and 1092 Oe, respectively. Interestingly,
large magnetization 15 emu/g and lowest HC (= 56 Oe) were observed for sample S2 compared to all other samples.
The unusual magnetic properties of the samples are due to morphology (shape, size, and self-assembled 1D
orientation of particles), surface spin disorder, and (surface/interface) anisotropy of the nanoparticles.