The magnetization reversal in exchange-biased (Co/Pt)_5/Co/FeMn multilayer with perpendicular magnetic anisotropy has been studied depending on the angle between an applied field and the easy axis (the normal of the film plane). The results show different characters from that in most in-plane exchange bias systems. In a large angular range, the magnetization rotates first toward the adjacent direction of easy axis for both descending and ascending branches because perpendicular magnetic anisotropy is much larger than unidirectional exchange anisotropy. With increasing the angle from 0 deg to 90 deg, the magnitude of the exchange bias field decreases, but the coercivity increases due to domain nucleation and propagation included in the magnetization reversal process. The angular dependence of magnetization reversal shows no hysteresis between clockwise and counterclockwise rotations.
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机译：通过垂直磁各向异性的交换偏置（CO / PT）_5 / CO / FEMN多层的磁化反转已经根据施加的场和容易轴（胶片平面的法线）进行了研究。结果显示在大多数面内交换偏置系统中的不同字符。在大角度范围内，磁化首先朝向易轴的邻近方向旋转，因为垂直磁各向异性远远大于单向交换各向异性。随着从0°至90°的角度增加，交换偏置场的大小降低，但由于磁化反转过程中包括的域成核和传播，矫顽力增加。磁化反转的角度依赖性在顺时针和逆时针旋转之间没有显示滞后。
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