Dresden 2020 – wissenschaftliches Programm

Die DPG-Frühjahrstagung in Dresden musste abgesagt werden! Lesen Sie mehr ...

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

TT: Fachverband Tiefe Temperaturen

TT 65: Poster Session Topological Topics

TT 65.8: Poster

Donnerstag, 19. März 2020, 15:00–19:00, P2/EG

Electron spin resonance spectroscopy measurement of a magnetic topological insulator material MnBi4Te7 — •Kavita Mehlawat1,3, Alexey Alfonsov1,3, Anna Isaeva1,2,3, Bernd Buechner1,2,3, and Vladislav Kataev1,31Institute for Solid State and Materials Research, Leibniz IFW Dresden, Dresden, Germany — 2Faculty of Physics, Technische Universitaet Dresden, Dresden, Germany — 3Wuerzburg-Dresden Cluster of Excellence ct.qmat

The van der Waals compound MnBi4Te7 belongs to the family of (Bi2Te3)n(MnBi2Te4), (n = 0, 1, 2) heterostructures and is the first example of a compound which features both, the intrinsic net magnetization and band inversion. Static magnetic susceptibility (χ) and magnetization (M) measurements as a function of the applied field (H) on MnBi4Te7 show an antiferromagnetic state at TN = 13 K and a ferromagnetic-like hysteresis occurring upon cooling below 5 K [1]. We performed electron spin resonance (ESR) spectroscopy measurements to explore the dynamic magnetic properties of MnBi4Te7. From high-frequency ESR measurements, we obtain evidence that MnBi4Te7 is an easy-axis type ferromagnet and ferromagnetic spin correlations persist up to T = 30 K on the time scale of an ESR experiment (10−10 - 10−11 s).

[1] Raphael C. Vidal et. al, arXiv:1906.08394

100% | Mobil-Ansicht | English Version | Kontakt/Impressum/Datenschutz
DPG-Physik > DPG-Verhandlungen > 2020 > Dresden