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arXiv · 2308.13855

Electrical detection of interfacial exchange field at the (ferromagnetic insulator)|(normal metal) interface using spin-dependent scattering

Prasanta Muduli·Naëmi Leo·Mingran Xu·Zheng Zhu·Jorge Puebla·Christian Ortiz·Hironari Isshiki·YoshiChika Otani
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Abstract

The spin-orbit field and interfacial exchange field are two major interface phenomena, and the detection and manipulation of these fields can enable a variety of nanoscale spintronics devices. Optimizing the interfacial exchange field, which governs the spin-dependent scattering asymmetry at (ferromagnetic insulator)-(normal metal) interfaces, will pave the way for next-generation nanoscale, low-power insulator spintronics devices. Here, we demonstrate an experimental pathway to detect an interfacial exchange field between insulating ferromagnet EuS and non-magnetic Cu using magnetoresistance measurements, and show that the spin-dependent scattering at the common interface can lead to a significant current-in-plane magnetoresistance in Py$|$Cu$|$EuS trilayer Hall-bar device. Our experiment suggests that simple magnetoresistance measurements can be used to experimentally detect the interfacial exchange field and thereby the magnetic state of a ferromagnetic insulator.

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Prasanta Muduli, Naëmi Leo, Mingran Xu, Zheng Zhu, Jorge Puebla, Christian Ortiz, Hironari Isshiki, YoshiChika Otani. 2023-08-26. Electrical detection of interfacial exchange field at the (ferromagnetic insulator)|(normal metal) interface using spin-dependent scattering. https://doi.org/10.1088/1361-6463%2Fade691

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