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

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

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


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.

Original languageEnglish
Article number94
Journalnpj 2D Materials and Applications
Issue number1
Publication statusPublished - Dec 2021

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering


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