TY - JOUR

T1 - Iron-rich talc as air-stable platform for magnetic two-dimensional materials

AU - Matković, Aleksandar

AU - Ludescher, Lukas

AU - Peil, Oleg E.

AU - Sharma, Apoorva

AU - Gradwohl, Kevin-Peter

AU - Kratzer, Markus

AU - Zimmermann, Maik

AU - Genser, Jakob

AU - Fisslthaler, Evelin

AU - Knez, Daniel

AU - Gammer, Christoph

AU - Lugstein, Alois

AU - Bakker, Ronald

AU - Romaner, Lorenz

AU - Zahn, Dietrich R.T.

AU - Hofer, Ferdinand

AU - Salvan, Gorgeta

AU - Raith, Johann G.

AU - Teichert, C.

PY - 2021/12/21

Y1 - 2021/12/21

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?eid=2-s2.0-85121543751&partnerID=MN8TOARS

U2 - 10.1038/s41699-021-00276-3

DO - 10.1038/s41699-021-00276-3

M3 - Article

VL - 94.2021

JO - npj 2D materials and applications

JF - npj 2D materials and applications

SN - 2397-7132

IS - 5

ER -