Effect of external magnetic field on the deposition of BaFe12O19

The contribution of an external magnetic field on the deposition of BaFe12O19 thin film was investigated. For this purpose, two (one with applied field and another without field) thin films of BaFe12O19 were deposited on the C-plane oriented sapphire (Al2O3) substrate employing pulsed laser deposition technique. Crystallographic orientation and texture were determined using an X-ray diffractometer. The magnetic parameters were deduced from a vibrating sample magnetometer (VSM). A spectrometer was used to study the optical properties of the films. The structural results reveal the film to be predominantly single phase with C-plane orientation in both the cases. The film deposited with field, however, has bigger grain size and more perfection in crystallinity. The magnetic parameters show that the film deposited with the field has more remanence magnetization and higher coercive field. The diffuse reflectance of the film deposited with field is much higher due to the increased grain size and roughness.