Magnetic and optical property studies of organic and inorganic perovskites
ABSTRACT :
Metal-Organic frameworks (MOFs) are compounds consisting of metal ions or clusters coordinated to organic ligands to form one, two, or three-dimensional structures. These compounds can have ABX3 perovskite architecture. Chromium (Cr) based MOF is a theoretically predicted compound expected to exhibit multiferroicity and photoluminescence. In the present work, structural and physical properties of Cr-MOF and magnetic field dependent variation of various physical properties will be studied, especially the magneto-photoluminescence of Cr-based MOF’s. LaCrO3 (LCO) is an inorganic perovskite which has a GdFeO3 type distorted perovskite structure that exhibits a G-type antiferromagnetic insulator behaviour with orthorhombic structure and Pnma space group. It is of great interest to investigate how its magnetic and optical properties change with respect to the change in the density of 3d electrons in LaCrO3. Since the electronic structure of Ga3+ is 3d10, Ga-doping in place of Cr dilutes the density of 3d electrons in LaCrO3. Therefore, not only the electronic transport properties but also the magnetic and optical properties are expected to change as a result of Ga doping. Magnetic and optical studies will also be extended to divalent ion doing (eg., Zn2+ and Mg2+) at the La3+.