Transition-metal dihalides (TMDH) are emerging as a highly promising class of 2D magnetic materials due to their simplicity, stability, and compatibility with nanofabrication techniques. In this work, we explore the structural, electronic, and magnetic properties of monolayer CoCl2 grown epitaxially on Au(111) using a multitechnique approach. Our results reveal that epitaxial CoCl2 exhibits ferromagnetic order below 24 K with strong in-plane magnetic anisotropy, setting it apart from other TMDH materials. Additionally, we identify in-gap states arising from the CoCl2-Au(111) interface, which provide insights into its electronic behavior. These findings position CoCl2 as a versatile 2D material for spintronic applications and nanoscale devices, bridging the gap between fundamental research and real-world technological solutions.

Centro de Física de Materiales 20018 Donostia San Sebastián Spain

CIC nanoGUNE BRTA 20018 Donostia San Sebastian Spain

Departamento de Física de la Materia Condensada Universidad de Zaragoza E 50009 Zaragoza Spain

FZU Institute of Physics of the Czech Academy of Sciences Cukrovarnická 10 Prague 6 CZ 16200 Czech Republic

Instituto de Nanociencia y Materiales de Aragón CSIC Universidad de Zaragoza 50009 Zaragoza Spain

Laboratorio de Microscopias Avanzadas Universidad de Zaragoza E 50018 Zaragoza Spain

Synchrotron SOLEIL 91190 Saint Aubin France

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