| Materials which possess electrical and magnetic coupling are of great interest for novel devices. In this thesis, BiFe1-xD xO3 (D= Co, Cr and Mn) material system were synthesized by solution route for various compositions, and thin films were prepared by spin coating on Pt (Pt/Ti/SiO2/Si) substrates. Structural properties of the films were investigated by X-ray diffraction and Raman spectroscopy. X-ray diffraction patterns confirms an intense (110) peak in BiFeO3 and BiFe 1-xDxO3 (D= Co, Cr and Mn) composites. Observed diffraction peaks for BiFe1-xDxO3 (D= Co, Cr and Mn) suggests the formation of rhombohedral perovskite structure with the space group R3c. BiFe1-xDxO3 (D= Co, Cr and Mn) films show a weak ferroelectric polarization and ferromagnetism at room temperature. Ferroelectric and ferromagnetic behavior in the same phase could be attributed to the elimination of oxygen vacancies and increased stress in the crystal structure. In addition, some results are shown of new composite materials, which show both ferroelectric and ferromagnetic behavior. |
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