Study on the Effect of Nano Size of Strontium-Ytterbium Manganites on Some Physical Properties

The present study devoted to studying the effect of particle size on electrical properties of multiferroic materials; YbMnO3 and Yb0.9Sr0.1MnO3 because of the growing interest in multiferroic materials. This great attention increased due to the potential applications in spintronics and in ferroelectromagnets, in addition to the inherent interest in the underlying physics of the coexistence of ferroelectricity and ferromagnetism. Ytterbium manganites were prepared using co-precipitation method from the initial pure chlorides of ytterbium, strontium and manganese to react with pure sodium hydroxide with the proper molar ratio. The synthesized semiconductor composites were studied in details in terms of their morphological and structural properties. The energy dispersive spectroscopy EDS reveals that the synthesized composites are in a proper stoichiometry of the proposed structure. The X-ray analysis of Yb0.9Sr0.1MnO3 exhibited that crystal structure is possessing mixed orthorhombic/hexagonal phase with space group Pnma (62) for orthorhombic phase while a space group P6(3)cm (185) for hexagonal phase. The DC resistivity - temperature dependence measurements of Yb0.9Sr0.1MnO3 and YbMnO3 showed the semiconductor behavior.