Exchange bias and intrinsic Gilbert damping [Formula: see text] are two important parameters in magnetic multilayers. To explore the correlation between exchange coupling and damping, the samples Ta (2.6[Formula: see text]nm)/Pt (2.5[Formula: see text]nm)/Co[Formula: see text]Fe[Formula: see text]B[Formula: see text] (0.63[Formula: see text]nm)/Pt (0.5[Formula: see text]nm)/Mn[Formula: see text]Ir[Formula: see text] ([Formula: see text])/Ta (4[Formula: see text]nm) are deposited by using pulsed-DC magnetron sputtering. The static and dynamic magnetic responses with different thickness of antiferromagnetic MnIr are investigated using vibrating sample magnetometer (VSM) and the pump-probe time-resolved magneto-optical Kerr effect (TR-MOKE). The exchange bias initially increases and then decreases with increasing thickness of MnIr layer, which is associated with the interfacial exchange coupling. The dynamic results demonstrate that the Gilbert damping of CoFeB/Pt/MnIr can increase by up to 40% compared with CoFeB/Pt. Based on the fact that the spin pumping has been excluded because of the Pt interlayer, we attribute the enhancement in Gilbert damping to the exchange coupling between AFM and FM.

中文翻译：

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退火垂直交换偏置 CoFeB/Pt/MnIr 多层膜中的吉尔伯特阻尼

交换偏置和固有吉尔伯特阻尼[公式：见正文]是磁性多层的两个重要参数。为了探索交换耦合和阻尼之间的相关性，样品Ta（2.6[公式：见文]nm）/Pt（2.5[公式：见文]nm）/Co[公式：见文]Fe[公式：见文] B[公式：见文]（0.63[公式：见文]nm）/Pt（0.5[公式：见文]nm）/Mn[公式：见文]Ir[公式：见文]（[公式：见文） ])/Ta（4[公式：见正文]nm）通过使用脉冲直流磁控溅射沉积。使用振动样品磁力计（VSM）和泵浦探针时间分辨磁光克尔效应（TR-MOKE）研究了不同厚度反铁磁MnIr的静态和动态磁响应。交换偏压随着 MnIr 层厚度的增加而开始增加然后减少，这与界面交换耦合有关。动态结果表明，与 CoFeB/Pt 相比，CoFeB/Pt/MnIr 的 Gilbert 阻尼最多可增加 40%。基于由于 Pt 夹层而排除了自旋泵浦这一事实，我们将吉尔伯特阻尼的增强归因于 AFM 和 FM 之间的交换耦合。