Jyoti Rani

Crystal structure analysis of lead free Ba{sub 1-x}La{sub x}[Ti{sub 0.5}(Fe{sub 0.5}Nb{sub 0.5}){sub 0.5}]{sub 1-x/4}O{sub 3} Ceramics

Single phase Ba1-xLax[Ti0.5(Fe0.5Nb0.5)0.5]1-x/4O3 [referred as BT-LFN]; x=0, 0.02, 0.04 and 0.06 ceramics have been synthesized by solid – state reaction process and were characterized by X-ray diffraction technique. The microstructure of the ceramics was examined by field emission-scanning electron microscopy (FE-SEM).

Synthesis and characterization of quasi one dimensional oxide, Ca3CoMnO6 multiferroic

Polycrystalline specimen of Ca3CoMnO6 was prepared by conventional solid state reaction method. Powder was calcined in air at 1273 K for 24 h. Sample was characterized by X-ray diffraction using Cu (Kα) and found to be single phase. Grain size was observed to be 700 nm from field effect scanning electron microscopy. Magnetization was found to be ∼ 0.3306 emu/g at magnetic field of 10 kOe.

Magnetocapacitance and Magnetic Properties of Cr³+ Ions Doped Hematite Prepared by Sol-Gel Method at Room Temperature

Hematite (α-Fe2O3) and 5 mol.% Cr3+ ions doped hematite were synthesized by sol gel method. X-ray diffraction (XRD) patterns of powder calcined at 500 0C show the formation of single-phase rhombohedral structure. Thermogravimetric (TG) analysis of as prepared powder indicates the formation of sample around 400 0C. FESEM analysis shows grain size of sintered pellets ~ 100 nm. Magnetization of hematite powders was found to be higher compared with Cr3+ ions doped hematite at the same magnetic field (10 kOe). We observed magnetocapacitance in both the systems at room temperature. As neither hematite nor Cr3+ ions doped hematite is multiferroic material, the observed magnetodielectric property is believed to arise from extrinsic effect such as magnetoresistance. Keywords—Sol-gel; Magnetic materials; Hematite; X-ray diffraction.