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- W4387389625 abstract "Van der Waals (vdW) magnetic materials such as Cr2Ge2Te6 (CGT) show promise for novel memory and logic applications. This is due to their broadly tunable magnetic properties and the presence of topological magnetic features such as skyrmionic bubbles. A systematic study of thickness and oxidation effects on magnetic domain structures is important for designing devices and vdW heterostructures for practical applications. Here, we investigate thickness effects on magnetic properties, magnetic domains, and bubbles in oxidation-controlled CGT crystals. We find that CGT exposed to ambient conditions for 30 days forms an oxide layer approximately 5 nm thick. This oxidation leads to a significant increase in the oxidation state of the Cr ions, indicating a change in local magnetic properties. This is supported by real space magnetic texture imaging through Lorenz transmission electron microscopy. By comparing the thickness dependent saturation field of oxidized and pristine crystals, we find that oxidation leads to a non-magnetic surface layer with a thickness of about 10 nm, thicker than the oxide layer alone. We also find that the stripe domain width and skyrmionic bubble size are strongly affected by the crystal thickness in pristine crystals. These findings underscore the impact of thickness and surface oxidation on the properties of CGT such as saturation field and domain/skyrmionic bubble size and suggest a pathway for manipulating magnetic properties through a controlled oxidation process." @default.
- W4387389625 created "2023-10-06" @default.
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- W4387389625 date "2023-10-03" @default.
- W4387389625 modified "2023-10-17" @default.
- W4387389625 title "Magnetic Property Control of Cr2Ge2Te6 Through Oxidation and Thickness Effects" @default.
- W4387389625 doi "https://doi.org/10.48550/arxiv.2310.02319" @default.
- W4387389625 hasPublicationYear "2023" @default.
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