Investigations on barium ferrite magnetic thin films

Summary form only given. Barium ferrite thin films are promising candidates for both longitudinal and perpendicular recording media. It is important to understand the time dependent phenomena in these thin films as many of the critical properties of magnetic recording media are directly related to it. The time dependent phenomenon is also known as magnetic viscosity. The magnetic viscosity parameter, A, can be derived either from measurement of magnetisation as a function of time under constant magnetic field, or from measurement of hysteresis loops under variable field rate (R).