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Intrinsic Magnetic Proximity Effect at the Atomically Sharp Interface of CoxFe3-xO4/Pt Grown by Molecular Beam Epitaxy.

ABSTRACT: CoxFe3-xO4(CFO)/Pt bilayers prepared by molecular beam epitaxy were investigated for the anomalous Hall effect and X-ray magnetic circular dichroism (XMCD). We found that the anomalous Hall effect originates from a magnetic proximity effect at the CFO/Pt interface. The XMCD signal in the Pt L-edge was obtained only for the sample deposited at 600 °C, indicating that the magnetic proximity effect is sensitive to the interface structure. Transmission electron microscopy images of the CFO/Pt interface and XMCD measurements of Co and Fe L-edges do not provide direct evidence for interfacial atomic diffusion or alloying. In summary, these results suggest that the magnetic proximity effect is robust for transport properties, such as the anomalous Hall effect, while the induced magnetic moment depends on slight differences in the interfacial structure, such as the presence or absence of interfacial oxygen ions.

SUBMITTER: Nodo S 

PROVIDER: S-EPMC10357544 | biostudies-literature | 2023 Jul

REPOSITORIES: biostudies-literature

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Intrinsic Magnetic Proximity Effect at the Atomically Sharp Interface of Co<i><sub>x</sub></i>Fe<sub>3-<i>x</i></sub>O<sub>4</sub>/Pt Grown by Molecular Beam Epitaxy.

Nodo Shoto S   Yamane Ichiro I   Suzuki Motohiro M   Okabayashi Jun J   Yokokura Seiya S   Shimada Toshihiro T   Nagahama Taro T  

ACS omega 20230704 28

Co<i><sub>x</sub></i>Fe<sub>3-<i>x</i></sub>O<sub>4</sub>(CFO)/Pt bilayers prepared by molecular beam epitaxy were investigated for the anomalous Hall effect and X-ray magnetic circular dichroism (XMCD). We found that the anomalous Hall effect originates from a magnetic proximity effect at the CFO/Pt interface. The XMCD signal in the Pt <i>L</i>-edge was obtained only for the sample deposited at 600 °C, indicating that the magnetic proximity effect is sensitive to the interface structure. Transm  ...[more]

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