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Proximity-induced ferromagnetism and chemical reactivity in few layers VSe2 heterostructures

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Author(s)

G Vinai, C Bigi, Akhil Rajan, Matthew David Watson, T .-L. Lee, Federico Mazzola, S. Modesti, S. Barua, M Ciomaga Hatnean, G Balakrishnan, Phil King, P Torelli, G. Rossi, G Panaccione

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Abstract

Among Transition-Metal Dichalcogenides, mono and few-layers thick VSe2 has gained much recent attention following claims of intrinsic room-temperature ferromagnetism in this system, which have nonetheless proved controversial. Here, we address the magnetic and chemical properties of Fe/VSe2 heterostructure by combining element sensitive absorption spectroscopy and photoemission spectroscopy. Our x-ray magnetic circular dichroism results confirm recent findings that both native mono/few-layer and bulk VSe2 do not show any signature of an intrinsic ferromagnetic ordering. Nonetheless, we find that ferromagnetism can be induced, even at room temperature, after coupling with a Fe thin film layer, with antiparallel alignment of the moment on the V with respect to Fe. We further consider the chemical reactivity at the Fe/VSe2 interface and its relation with interfacial magnetic coupling.
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Details

Original languageEnglish
Article number035404
JournalPhysical Review. B, Condensed matter and materials physics
Volume101
Issue number3
DOIs
Publication statusPublished - 8 Jan 2020

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