Threshold Interface Magnetization Required to Induce Magnetic Proximity Effect

Abstract

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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Cited by in corpus (7)

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• Elucidating proximity magnetism through polarized neutron reflectometry and machine learning
• Quantitative comparison of the magnetic proximity effect in Pt detected by XRMR and XMCD
• Optimising experimental design in neutron reflectometry
• Pt and CoB trilayer Josephson $\pi$ junctions with perpendicular magnetic anisotropy
• Determining the Proximity Effect Induced Magnetic Moment in Graphene by Polarized Neutron Reflectivity and X-ray Magnetic Circular Dichroism