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MA: Fachverband Magnetismus
MA 36: Spin-Dependent 2D Phenomena
MA 36.3: Vortrag
Mittwoch, 18. März 2020, 15:45–16:00, HSZ 101
Effect of hydrostatic pressure on the magneto-elastic coupling in 2D ferromagnet Cr2Ge2Te6 — •Laura T. Corredor-Bohórquez1, Bastian Rubrecht1, Gael Bastien1, Anja U. B. Wolter1, Sebastian Selter1, Saicharan Aswartham1, and Bernd Büchner1,2 — 1Institute for Solid State and Materials Research, Leibniz IFW Dresden, 01069 Dresden — 2Faculty of Physics, Technische Universität Dresden, Dresden
Low–dimensional magnetism is currently a rapidly developing area of research: the existing challenges in this area are mainly associated with the search and improvement of compounds whose characteristics meet the needs of innovative technologies. For exciting new applications such as ultra-compact spintronics or magnonic devices, 2D magnetic order is crucial. Following the recent re-visit of 2D ferromagnetic semiconductor Cr2Ge2Te6, a full understanding of the mechanism behind its magnetism is compelling. Two main magnetic nearest-neighbor interactions are theoretically predicted: an AFM direct exchange interaction, and a FM superexchange interaction, being the ground state a result from the competition between them. In order to investigate how the magneto elastic coupling influences the physical properties of this material, we have performed hydrostatic pressure experiments. The magnetic field was applied in the c axis, i.e. the easy-magnetization axis. AFM interaction is enhanced, at the same time that there is a reduction of the FM properties, as predicted earlier from first principle calculations. The roles of competing magnetic interactions and anisotropy with the increase of pressure are discussed.