,Micromagnetic simulation for high field sensors with perpendicular magnetizations

• 作 者: Jin Wei Liu Yao-Wen
• 机 构: Department of Physics, Tongji University, Shanghai 200092, China“,”College of Physics and Communicat
• 出 处: 中国物理（英文版）
• 发表日期: 2007年6期
• 关键词: micromagnetic simulation giant magnetoresistive coercivity demagnetizing field

In this paper, we present a micromagnetic design for high field sensors. The hard layer of the sensors is L10-FePt which is magnetized perpendicularly to film plane and the sense layer is NiFe which is magnetized in the film plane. The magnetization configurations of the hard and sense layers at different exteal magnetic fields have been simulated. In micromagnetic simulation, the sense field up to one tesla can be reached by using this sensor. We find that whether the sensor has a symmetric or an asymmetric field-sensing window is determined by the coercive field of the hard layer and the demagnetizing field of the sense layer.