Semiconductor-ferromagnetic nature of rare-earth based ferrocobaltite SmFe0.5Co0.5O3
Description
Original data from X-ray diffraction measurements, diffuse reflectance spectroscopy, electrical resistivity, current-voltage curves (JvsE), magnetic moment as a function of temperature, magnetic moment as a function of applied field, electronic band structure, and density of electronic states as a function of energy are included for the perovskite-type material SmFe0.5Co0.5O3, from whose analyses its semiconducting ferromagnetic characteristic in the temperature regime T<300 K is demonstrated.
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Steps to reproduce
The synthesis of the SmFe0.5Co0.5O3 material was carried out through the standard ceramic method, which has proven to be an appropriate technique for the synthesis of perovskite-type materials based on iron and rare earths [22]. Powdered precursor oxides of Sm2O3, Fe2O3 and Co3O4 of 99.999%, 99.995% and 99.995% purity, respectively, were dried at 120 oC to remove moisture and weighed in stoichiometric proportions according to the double perovskite formula to form 1 g mass samples, for which an Ohaus Pioneer model analytical balance with 0.1 mg accuracy was used The powders were mixed and ground in an agate mortar for 3 hours, pressed into 9.0 mm diameter tablets under a pressure of 152.13 MPa, and then subjected to a first thermal calcination process at 850 oC for 24 hours in a Lindberg-Blue muffle-type furnace. Subsequently, the tablets were macerated for 30 min and pressed again for final sintering at 1120 oC for 72 hours to ensure interdiffusion and growth of crystallites and grains of the material.
Institutions
- Universidad Nacional de Colombia