Paper Title
Magnetic and Physical Rivalry in Exchange Interaction For SPINEL- PEROVSKITE NANOCOMPOSITE

Abstract
In this research peroviskite-spinel nanocomposite with formula (La0.9o Bi0.10 FeO3)1-x(Cuo.3Mn0.7Fe2O4)x; 0 ≤ x ≤ 1, were prepared by auto-combustion method. Single phase of orthorohombic and cubic structure of La0.9o Bi0.10 FeO3; Cuo.3Mn0.7Fe2O4 respectively have been proved using XRD patterns analysis. The XRD data analysis shows that the nanocomposites have only the two phases of parents without any further secondary phase. High Resolution Transmission Electron Microscopy (HRTEM) images reveal spherical nanoparticles for the parents and agglomerated for nanocomposites. Magnetic hysteresis loops demonstrated ferromagnetic (FM) behavior for the spinel compound and nanocomposite, where LBFO possesses G-type antiferromagnetic (AFM). Competition between FM and antiferromagnetic AFM phases lead to change in magnetic parameters such as saturation magnetization (Ms), remnant magnetization (Mr), coercivity (Hc) and magnetic exchange bias at room and low temperatures. Keywords - Nanocomposite, peroviskite-spinel, magnetic properties, exchange interaction, exchange bias