The exchange-bias training effect in IrMn-layer/ferromagnetic-ribbon heterostructure is studied by performing magnetoimpedance (MI) measurements. Asymmetric, hysteretic and single peak behavior of the MI response and a shift in the MI peak to zero fields accompanied by 52% increase in MI has been detected as the signature of the exchange bias (EB) and training effect (TE), respectively. Also, during the consecutive filed sweep of MI response, both EB field and the degree of asymmetry of MI decrease that is another reason for existence of TE in our sample. The analysis of the magneto-optical Kerr effect (MOKE) and MI behavior establish that Hoffmann s model (Phys. Rev. Lett. 93, 097203 (2004)) is a good description of our experimental data, due to the existence of a strong single cycle TE in our IrMn-layer/ferromagnetic-ribbon system.

中文翻译：

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用磁阻抗探测的 IrMn 层/铁磁带异质结构中的交换偏置训练效应

通过执行磁阻抗 (MI) 测量来研究 IrMn 层/铁磁带异质结构中的交换偏置训练效果。MI 响应的不对称、滞后和单峰行为以及伴随 MI 增加 52% 的 MI 峰向零场的偏移已被检测为分别作为交换偏差 (EB) 和训练效应 (TE) 的特征。此外，在 MI 响应的连续场扫描期间，EB 场和 MI 的不对称程度都降低，这是我们样本中存在 TE 的另一个原因。磁光克尔效应 (MOKE) 和 MI 行为的分析表明，霍夫曼模型 (Phys. Rev. Lett. 93, 097203 (2004)) 很好地描述了我们的实验数据，因为存在强我们的 IrMn 层/铁磁带系统中的单循环 TE。