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.

Proximity-induced ferromagnetism and chemical reactivity in few-layer VSe2 heterostructures / G. Vinai, C. Bigi, 1. Rajan, M.D. Watson, T.-. Lee, F. Mazzola, S. Modesti, S. Barua, M. Ciomaga Hatnean, G. Balakrishnan, P.D.C. King, P. Torelli, G. Rossi, G. Panaccione. - In: PHYSICAL REVIEW. B. - ISSN 2469-9950. - 101:3(2020 Jan 08). [10.1103/PhysRevB.101.035404]

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

C. Bigi
Secondo
;
G. Rossi
Penultimo
;
2020

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.
Settore FIS/03 - Fisica della Materia
8-gen-2020
Article (author)
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/702561
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