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arXiv 1902.04308cond-mat.mtrl-sci
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产生磁邻近效应所需的临界界面磁化强度

Threshold Interface Magnetization Required to Induce Magnetic Proximity Effect

O. Inyang, L. Bouchenoire, B. Nicholson, M. Tokac, R. M. Rowan-Robinson, C. J. Kinane, A. T. Hindmarch

摘要:

邻近感应磁化(PIM)在采用自旋电流的界面驱动自旋电子学应用中具有广泛的意义。我们直接确定PIM之间的缩放在Pt和温度依赖的界面磁化强度在相邻的铁磁体(FM)使用深度分辨磁强计。作为温度的函数,由于PIM引起的磁化不遵循通常预期的FM界面磁化的线性缩放。相反,它消失,而FM界面磁化仍然存在。重金属(HM)层的有效磁化率示出引起以前无法解释的非对称PIM中发现HM/FM/HM三层。

英文摘要:

Proximity-induced magnetization (PIM) has broad implications across interface-driven spintronics applications employing spin-currents. We directly determine the scaling between PIM in Pt and the temperature-dependent interface magnetization in an adjacent ferromagnet (FM) using depth-resolved magnetometry. The magnetization due to PIM does not follow the generally expected linear scaling with the FM interface magnetization, as a function of temperature. Instead, it vanishes whilst the FM interface magnetization remains. The effective magnetic susceptibilities of heavy metal (HM) layers are shown to give rise to the previously unexplained asymmetric PIM found in HM/FM/HM trilayers.

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