Maximizing Magnetic Domain Densities in 60Å Co/Pt Thin Film

In Co/Pt thin films, magnetic domains are present perpendicular to the plane of the sample. These domains can be found in different forms ranging from maze like structure to a spotted or bubbly form. The domain morphologies can change in response to an external magnetic field. To study these responses, we have been imaging the domains at varying field strengths. My work specifically focused on Co/Pt multilayers with 60 Å of Cobalt. A Vibrating Sample Magnetometer (VSM) was used to apply a field to a 60 Å Co/Pt thin film and obtain data on its hysteresis. Magnetic force microscopy (MFM) then imaged the domains at remanence, or without a magnetic field present. By statistically analyzing the images, we were able to find the field that resulted in the highest density of domains. This density was significantly greater than at other fields. Easy production of high density morphologies could lead to advances in data storage.