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The powder β Fe2O3 sample

TEM images and SAED pattern were obtained using a JEOL JEM–2010 electron microscope operating at 160 kV with a point–to–point resolution of 1.9 Å. For each measurement, a very dilute sample dispersion drop was placed on a copper grid with a holey carbon film and allowed to dry under vacuum at room temperature. HRTEM images were obtained using a TITAN 60–300 high-resolution transmission electron microscope with an X-FEG emission gun operating at 80 kV. For HRTEM analyses, the powder β-Fe2O3 sample was dispersed in ethanol and ultrasonicated for 5 minutes. One drop of the resulting suspension was then placed on a copper grid covered with a holey carbon film and allowed to dry at room temperature. A superconducting quantum interference device (SQUID) magnetometer (MPMS XL-7 type, Quantum Design, U.S.A.) was used to measure the magnetization of the β-Fe2O3 sample after pressure release. The temperature evolution of the sample magnetization was recorded under an external magnetic field of 20 kOe in the sweep mode at temperatures ranging from 5 to 300 K. The gathered data were corrected to account for the paramagnetic and diamagnetic contributions from the material the sample was pressed into. For indexing the peaks and searching the space group, the JADE software from Materials Data., Inc. (MDI) was employed. Rietveld analyses were performed using the PDXL Integrated X-ray powder diffraction software package from Rigaku. The phase fractions, lattice parameters, peak width, and decay parameters were refined when analyzing the synchrotron radiation XRD patterns. If you are looking for high quality, high purity, and cost-effective Iron oxide, or if you require the latest price, please feel free to email contact mis-asia.

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