| Popis: |
Magnetic particles of W‐type barium‐calcium hexaferrite (BaCa2Fe16O27) have been synthesized using a Stearic acid gel route. The gel precursors were dried at 100° C for 2 hrs and then calcinated at 650° C, 750° C, 850° C and 950° C for 4 hrs in a furnace and slowly cooled to room temperature in order to obtain barium‐calcium hexaferrite particles. The microscopic magnetic properties of prepared samples studying using Mossbauer spectroscopy. Mossbauer spectra of all samples were recorded at room temperature. Mossbauer parameters like Isomer shift, Quadruple splitting etc. were calculated with respect to iron foil. Barium calcium hexaferrite samples heated at 650° C, 750° C, 850° C show relaxation type Mossbauer spectra along with paramagnetic doublet. The intensity of paramagnetic doublet increases with temperature confirm the presence of ferrous ions in the samples, where as sample calcinated at 950° C confirm the presence of ferrimagnetic phase with partial super paramagnetic nature of prepared hexaferri... |
