Mechanosynthesis and characterization of Bi1-xLaxFeO3 with 0,05 ¡Ü x ¡Ü 0,6

A. A. CRISTÓBAL; M. S. CONCONI; C. P. RAMOS; P. G. BERCOFF; P. BOTTA

Torino

Simposio; 20th International Symposium on Metastable, Amorphous and Nanostructured Materials ¨C ISMANAM 2013.; 2013

Multiferroic materials possess the properties of ferroelectricity, ferromagnetism and even ferroelastic simultaneously due to the coupling between ferroelectric and magnetic orders within one phase. Multiferroic materials have attracted much attention in recent years, because of their potential for new device applications Besides the obvious practical interest, these materials have attracted strong academic interest since the coexistence of ferroelectricity and ferromagnetism in one phase occurs in very few cases, such as BiFeO3. A synthesis method which is presented as appropriate for these materials is the use of mechanochemical activation of precursors in high-energy mills. This treatment generates solids with a high energy content. Thus, the reactivity of such systems can be significantly modified, allowing on the one hand facilitate the preparation conditions, and secondly synthesizing metastable materials or phases non-obtainable by conventional methods. In this work a method based on the McCormick¡¯s synthesis is used for preparing Bi1-xLaxFeO3 with   0.05 ¡Ü x ¡Ü 0.6. Relationship between composition, crystalline structure and magnetic behavior of Bi1-xLaxFeO3 materials is discussed.