Abstract
A new method that the magnetization reversal of magnetic thin film was observed by the deflection of magnetic actuator under external magnetic filed to study the magnetization reversal of magnetic thin film is proposed. The magnetic actuator was bent by magnetic thin film, when it was placed in an external magnetic filed. On the other hand, the magnetic property of magnetic thin film can be analyzed by the deflection of magnetic actuator. The magnetic actuator is bent by magnetic torque produced by ferromagnetic thin film under an external magnetic field owing to the fabrication of a highly sensitive microcantilever and the design of a high magnetic shape anisotropy. These were discussed that the directions of the magnetic field can affect the magnetization reversal of magnetic thin film, that the directions of the magnetic field can affect the magnetization reversal of magnetic thin films, that the volume of magnetic thin film can affect the magnetization reversal of magnetic thin film, that the width of microcantilever can affect the magnetization reversal of magnetic thin film, that the shape of magnetic actuator can affect the magnetization reversal of magnetic thin films, and that the shape of tweezers can affect the magnetization reversal of magnetic thin films. A method of simulation that the magnetic torque under external magnetic field was analyzed by OOMMF, and then the deflection of magnetic actuator under the magnetic torque was analyzed by ANSYS was proposed to prove the experimental results.