Iron-rich talc as air-stable platform for magnetic two-dimensional materials

Aleksandar Matković, Lukas Ludescher, Oleg E. Peil, Apoorva Sharma, Kevin-Peter Gradwohl, Markus Kratzer, Maik Zimmermann, Jakob Genser, Evelin Fisslthaler, Daniel Knez, Christoph Gammer, Alois Lugstein, Ronald Bakker, Lorenz Romaner, Dietrich R.T. Zahn, Ferdinand Hofer, Gorgeta Salvan, Johann G. Raith, C. Teichert

Publikation: Beitrag in FachzeitschriftArtikelForschungBegutachtung


Intrinsically magnetic layered materials – especially monolayers – suffer from the lack of ambient stability and mostly exhibit magnetic ordering only at cryogenic temperatures. These restrains impose a great challenge for the integration of two-dimensional magnetic materials into future technologies. We propose to overcome this by exploiting phyllosilicates, such as iron-rich talc. Via combined magnetic force microscopy in applied external magnetic fields, superconducting quantum interference device magnetometry, first-principle calculations, and structural analysis, we demonstrate that incorporated iron ions in talc are in a very robust high spin state, resulting in a weak ferromagnetic behavior at room temperature. Iron-rich talc can be thinned down to a monolayer, remaining fully stable under ambient conditions, and retaining magnetic properties even in monolayers. Finally, we propose iron-rich end members of the phyllosilicates as very promising platforms for air-stable magnetic monolayers.
Fachzeitschriftnpj 2D materials and applications
PublikationsstatusElektronische Veröffentlichung vor Drucklegung. - 21 Dez. 2021

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