CHARACTERIZATION AND THERMAL AND ELECTROMAGNETIC BEHAVIOR OF GADOLINIUM-DOPED CALCIUM TARTRATE CRYSTALS GROWN BY THE SOLUTION TECHNIQUE

Energy dispersive analysis by X-rays (EDAX), X-ray diffraction (XRD), infrared (IR), thermogravimetric (TG), differential thermogravimetric (DTG), differential scanning calorimetric (DSC) and electromagnetic st udies carried out on crystalline materials obtained by diffusion of ga dolinium and calcium ions through silica gel impregnated with tartaric acid and grown by means of slow cooling between 72 degrees C and 40 d egrees C are reported. EDAX confirmed the presence of gadolinium. X-ra y diffraction data did not show any appreciable differences between th e structures of doped and undoped calcium tartrate. IR in the range of 500-4000 cm(-1) and the description of peaks recorded for the materia l are given. Results of thermal analysis (TG, DTG and DSC) indicated t hat the material is thermally unstable. Dielectric and magnetic measur ements were determined in the frequency range 45 MHz to 2 GHz.