Magnetische und dielektrische Untersuchungen des Raumtemperatur-Magneten SrRu2O6 und dessen dotierter Varianten
Zusammenfassung der Projektergebnisse
Sr1-xCaxRu2O6 materials have been synthesised by conventional hydrothermal synthesis methods and studied with respect to magnetic, transport, and structure properties. In contrast, the microwave-assisted hydrothermal process was not successful. Electrical transport studies on undoped materials are better described by a fluctuation-induced tunneling model in a wider temperature range. This together with unusually low, glass-like thermal conductivity confirms that electrical and thermal transport mechanism in SrRu2O6 needs further exploration. Highfrequency ESR studies up to 600 GHz and 16 T show no resonance features of antiferromagnetic resonance modes indicating a large zero-field gap of antiferromagnetic magnon excitations. Notably, SrRu2O6 nanosheets can be synthesized using a scalable technique of liquid exfoliation. Experimental data also suggest that exfoliation occurs from the planes perpendicular to the c-axis wherein the intervening hexagonal Sr lattice separates the two-dimensional Ru honeycomb. Our experimental data on structure effects agree with numerical predictions. First-principles calculations suggest that antiferromagnetism survives in these nanosheets. The experimental realization of graphene-like two-dimensional sheets of SrRu2O6 offers possibilities to explore emergent properties associated with a magnetic honeycomb lattice with large spin–orbit coupling.
Projektbezogene Publikationen (Auswahl)
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Filled carbon nanotubes as anode materials for Lithium-ion batteries, Molecules 25, 1064 (2020)
Thauer, Elisa; Ottmann, Alexander; Schneider, Philip; Möller, Lucas; Deeg, Lukas; Zeus, Rouven; Wilhelmi, Florian; Schlestein, Lucas; Neef, Christoph; Ghunaim, Rasha; Gellesch, Markus; Nowka, Christian; Scholz, Maik; Haft, Marcel; Wurmehl, Sabine; Wenelska, Karolina; Mijowska, Ewa; Kapoor, Aakanksha; Bajpai, Ashna; ... & Klingeler, Rüdiger
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Synthetically Encapsulated & Self-Organized Transition Metal Oxide Nano Structures inside Carbon Nanotubes as Robust Li-ion Battery Anode Materials
A. Kapoor, A.L. Patrike, N. Singh, E. Thauer, A. Ottmann, R. Klingeler, S. Ogale, A. Bajpai
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Few-Layer SrRu2O6 Nanosheets as Non-Van der Waals Honeycomb Antiferromagnets: Implications for Two-Dimensional Spintronics, ACS Appl. Nano Mat. 4, 9313-9321 (2021)
Homkar, Suvidyakumar; Chand, Bharat; Rajput, Shatruhan Singh; Gorantla, Sandeep; Das, Tilak; Babar, Rohit; Patil, Shivprasad; Klingeler, Rüdiger; Nair, Sunil; Kabir, Mukul & Bajpai, Ashna
