Proximity-induced ferromagnetism and chemical reactivity in few layers VSe2 heterostructures
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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.
Vinai , G , Bigi , C , Rajan , A , Watson , M D , Lee , T -L , Mazzola , F , Modesti , S , Barua , S , Ciomaga Hatnean , M , Balakrishnan , G , King , P , Torelli , P , Rossi , G & Panaccione , G 2020 , ' Proximity-induced ferromagnetism and chemical reactivity in few layers VSe 2 heterostructures ' , Physical Review. B, Condensed matter and materials physics , vol. 101 , no. 3 , 035404 . https://doi.org/10.1103/PhysRevB.101.035404
Physical Review. B, Condensed matter and materials physics
Copyright © 2019 American Physical Society. This work has been made available online in accordance with publisher policies or with permission. Permission for further reuse of this content should be sought from the publisher or the rights holder. This is the author created accepted manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at https://doi.org/10.1103/PhysRevB.101.035404
DescriptionFunding: Framework of the nanoscience foundry and fine analysis (NFFA-MIUR Italy Progetti Internazionali) project; Leverhulme Trust (Grant No. RL-2016-006); Royal Society.
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