Abstract
Since in-plane garnet films have no components of magnetization with respect to vertically incident lights, no magneto-optical effects on the light are observed. We supposed that when a Bi-YIG film was positioned obliquely to the incident light, the plane of polarization was rotated owing to the magnetooptical effect, because some component of magnetization with respect to the light path appeared. An in-plane Bi-YIG film was prepared on a Corning # 0317 glass substrate by rf sputtering, and was then magnetized in a magnetic field of 2 KOe. The apparatus for detecting Faraday rotation consisted of a polarization microscope and alight source. On the stage of the polarization microscope, the plane of the Bi-YIG film was tilted at 45°to the stage plane. The apparatus was used to obtain contrast images caused by the remanent magnetization of the in-plane Bi-YIG film. This result indicates that in-plane magneto-optical films can be applied to display devices.
