Probing Magnetic Ordering in Air Stable Iron‐Rich Van der Waals Minerals
Publikationen: Beitrag in Fachzeitschrift › Artikel › Forschung › (peer-reviewed)
Standard
in: Advanced physics research, Jahrgang 2.2023, Nr. 12, 2300070, 26.07.2023.
Publikationen: Beitrag in Fachzeitschrift › Artikel › Forschung › (peer-reviewed)
Harvard
APA
Vancouver
Author
Bibtex - Download
}
RIS (suitable for import to EndNote) - Download
TY - JOUR
T1 - Probing Magnetic Ordering in Air Stable Iron‐Rich Van der Waals Minerals
AU - Khan, Muhammad Zubair
AU - Peil, Oleg
AU - Sharma, Apoorva
AU - Selyshchev, Oleksandr
AU - Valencia, Sergio
AU - Kronast, Florian
AU - Zimmermann, Maik
AU - Aslam, Muhammad Awais
AU - Raith, Johann
AU - Teichert, Karl Christian
AU - Zahn, Dietrich R. T.
AU - Salvan, Georgeta
AU - Matković, Aleksandar
PY - 2023/7/26
Y1 - 2023/7/26
N2 - Magnetic monolayers show great promise for future applications in nanoelectronics, data storage, and sensing. The research in magnetic two-dimensional (2D) materials focuses on synthetic iodides and tellurides, which suffer from a lack of ambient stability. So far, naturally occurring layered magnetic materials have been overlooked. These minerals offer a unique opportunity to explore complex air-stable layered systems with high concentration of magnetic ions. Magnetic ordering in iron-rich phyllosilicates is demonstrated, focusing on minnesotaite, annite, and biotite. These naturally occurring layered materials integrate local moment baring ions of iron via magnesium/aluminum substitution in their octahedral sites. Self-inherent capping by silicate/aluminate tetrahedral groups enables air stability of ultra-thin layers. Their structure and iron oxidation states are determined via Raman and X-ray spectroscopies. Superconducting quantum interference device magnetometry measurements are performed to examine the magnetic ordering. Paramagnetic or superparamagnetic characteristics at room temperature are observed. Below 40 K ferrimagnetic or antiferromagnetic ordering occurs. In-field magnetic force microscopy on exfoliated flakes confirms that the paramagnetic response at room temperature persists down to monolayers. Further, a correlation between the mixture of the oxidation states of iron and the critical ordering temperature is established, indicating a path to design materials with higher critical temperatures via oxidation state engineering.
AB - Magnetic monolayers show great promise for future applications in nanoelectronics, data storage, and sensing. The research in magnetic two-dimensional (2D) materials focuses on synthetic iodides and tellurides, which suffer from a lack of ambient stability. So far, naturally occurring layered magnetic materials have been overlooked. These minerals offer a unique opportunity to explore complex air-stable layered systems with high concentration of magnetic ions. Magnetic ordering in iron-rich phyllosilicates is demonstrated, focusing on minnesotaite, annite, and biotite. These naturally occurring layered materials integrate local moment baring ions of iron via magnesium/aluminum substitution in their octahedral sites. Self-inherent capping by silicate/aluminate tetrahedral groups enables air stability of ultra-thin layers. Their structure and iron oxidation states are determined via Raman and X-ray spectroscopies. Superconducting quantum interference device magnetometry measurements are performed to examine the magnetic ordering. Paramagnetic or superparamagnetic characteristics at room temperature are observed. Below 40 K ferrimagnetic or antiferromagnetic ordering occurs. In-field magnetic force microscopy on exfoliated flakes confirms that the paramagnetic response at room temperature persists down to monolayers. Further, a correlation between the mixture of the oxidation states of iron and the critical ordering temperature is established, indicating a path to design materials with higher critical temperatures via oxidation state engineering.
U2 - 10.1002/apxr.202300070
DO - 10.1002/apxr.202300070
M3 - Article
VL - 2.2023
JO - Advanced physics research
JF - Advanced physics research
IS - 12
M1 - 2300070
ER -