Surface oxidation in a van der Waals ferromagnet Fe 3-x GeTe 2
Current Applied Physics, ISSN: 1567-1739, Vol: 30, Page: 40-45
2021
- 13Citations
- 16Captures
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Article Description
We investigate the surface oxidation in a van der Waals ferromagnet Fe 3-x GeTe 2, a material widely utilized for spintronic applications. While known for its relative air-insensitivity, exposure to air during the handling process (e.g. device or heterostructure fabrication) can lead to reduction or disappearance of its magnetic signal. Comparison of x-ray absorption and x-ray magnetic circular dichroism spectra between pristine and air-exposed Fe 3-x GeTe 2 confirm a naturally oxidized surface layer on the material. The surface oxide layer has predominantly Fe 3+ content. X-ray absorption spectroscopy done on micron-sized exfoliated Fe 3-x GeTe 2 flakes reveal that the change in the surface chemical properties can be quite significant for thin flakes. The surface modulation of Fe 3-x GeTe 2 can lead to inaccuracies in characterizing its interfacial magnetic and spin transport properties, and complicate device and heterostructure fabrication processes.
Bibliographic Details
http://www.sciencedirect.com/science/article/pii/S1567173921001139; http://dx.doi.org/10.1016/j.cap.2021.04.022; http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=85105444489&origin=inward; https://linkinghub.elsevier.com/retrieve/pii/S1567173921001139; https://api.elsevier.com/content/article/PII:S1567173921001139?httpAccept=text/xml; https://api.elsevier.com/content/article/PII:S1567173921001139?httpAccept=text/plain; https://dul.usage.elsevier.com/doi/; https://dx.doi.org/10.1016/j.cap.2021.04.022
Elsevier BV
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