Iron-rich talc as air-stable platform for magnetic two-dimensional materials
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Authors
Organisational units
External Organisational units
- Materials Center Leoben Forschungs GmbH
- Institute of Materials Science and Technology
- Zentrum f Elektronenmikroskopie Graz
- Technische Universität Graz
- Erich Schmid Institute of Materials Science
- Materials Engineering Group
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
Original language | English |
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Article number | 94 |
Number of pages | 9 |
Journal | npj 2D materials and applications |
Volume | 2021 |
Issue number | 5 |
DOIs | |
Publication status | E-pub ahead of print - 21 Dec 2021 |