Control of conductivity in Fe-rich cobalt-ferrite thin films with perpendicular magnetic anisotropy

Morishita, Masaya; Ichikawa, Tomoyuki; Tanaka, Masaaki; Furuta, Motoharu; Mashimo, Daisuke; Honda, Syuta; Okabayashi, Jun; Mibu, Ko

doi:10.1103/physrevmaterials.7.054402

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“…The shapes of hysteresis curves are different between 500 and 600 °C, which is consistent with the SQUID measurements. Large XMCD signals in the Co L edge correspond to contribution of the orbital moment through the distorted Co 2+ (3d 7 ) O h site. , …”

Section: Resultsmentioning

confidence: 99%

“…The XAS intensities of Co are suppressed owing to the composition ratio of 1:10, resulting in a composition of Co 0.27 Fe 2.73 O 4 with x = 0.27. The CFO with low Co composition exhibits perpendicular magnetic anisotropy (PMA). , The intensity ratio of XMCD to XAS is estimated to be 5 and 47% for the Fe and Co L 3 edges, respectively. The XAS and XMCD line shapes for Fe L edges show distinctive features due to three kinds of Fe states (Fe 3+ in O h , Fe 3+ in T d , and Fe 2+ in O h ).…”

Section: Resultsmentioning

confidence: 99%

“…Large XMCD signals in the Co L edge correspond to contribution of the orbital moment through the distorted Co 2+ (3d 7 ) O h site. 25 , 26 …”

Section: Resultsmentioning

confidence: 99%

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Intrinsic Magnetic Proximity Effect at the Atomically Sharp Interface of Co_xFe_3–xO₄/Pt Grown by Molecular Beam Epitaxy

et al. 2023

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Co x Fe 3−x O 4 (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.

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confidence: 99%

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confidence: 99%

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Intrinsic Magnetic Proximity Effect at the Atomically Sharp Interface of Co_xFe_3–xO₄/Pt Grown by Molecular Beam Epitaxy

et al. 2023

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Control of conductivity in Fe-rich cobalt-ferrite thin films with perpendicular magnetic anisotropy

Cited by 1 publication

References 60 publications

Intrinsic Magnetic Proximity Effect at the Atomically Sharp Interface of Co_xFe_3–xO₄/Pt Grown by Molecular Beam Epitaxy

Intrinsic Magnetic Proximity Effect at the Atomically Sharp Interface of Co_xFe_3–xO₄/Pt Grown by Molecular Beam Epitaxy

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Control of conductivity in Fe-rich cobalt-ferrite thin films with perpendicular magnetic anisotropy

Cited by 1 publication

References 60 publications

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

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

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Intrinsic Magnetic Proximity Effect at the Atomically Sharp Interface of Co_xFe_3–xO₄/Pt Grown by Molecular Beam Epitaxy

Intrinsic Magnetic Proximity Effect at the Atomically Sharp Interface of Co_xFe_3–xO₄/Pt Grown by Molecular Beam Epitaxy