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

Publikationen: Beitrag in FachzeitschriftArtikelForschung(peer-reviewed)

Autoren

  • Oleg E. Peil
  • Apoorva Sharma
  • Kevin-Peter Gradwohl
  • Jakob Genser
  • Evelin Fisslthaler
  • Daniel Knez
  • Christoph Gammer
  • Alois Lugstein
  • Lorenz Romaner
  • Dietrich R.T. Zahn
  • Ferdinand Hofer
  • Gorgeta Salvan
  • Johann G. Raith
  • C. Teichert

Externe Organisationseinheiten

  • Materials Center Leoben Forschungs GmbH
  • Technische Universität Wien
  • Zentrum für Elektronenmikroskopie Graz
  • Technische Universität Graz
  • Erich Schmid Institute of Materials Science of the Austrian Academy of Sciences, Leoben
  • Technische Universität Chemnitz

Abstract

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.

Details

OriginalspracheEnglisch
Seitenumfang9
Fachzeitschriftnpj 2D materials and applications
Jahrgang94.2021
Ausgabenummer5
DOIs
StatusElektronische Veröffentlichung vor Drucklegung. - 21 Dez 2021