Dresden 2026 – scientific programme

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FM: Fachverband Funktionsmaterialien

FM 11: Poster Session Functional Materials

FM 11.25: Poster

Tuesday, March 10, 2026, 18:00–20:30, P4

Controlled synthesis of the magnetic topological insulator MnSb₂Te₄ with variable Curie temperature — •Laura Zeni Cunha¹, Laura T. Corredor^2,3, Anja U.B. Wolter⁴, and Anna Isaeva^1,2,3 — ¹University of Amsterdam, The Netherlands — ²TU Dortmund University, Germany — ³Research Center Future Energy Materials and Systems, Germany — ⁴Leibniz IFW Dresden, Germany

Magnetic topological materials (MnX₂Te₄)(X₂Te₃)_n are promising candidates for spintronic and energy-efficient technologies.[1] MnSb₂Te₄ features tunable Mn content that enables optimization of the magnetic ground state and ordering temperature[2-4] - key requirements for potential applications. However, synthetic control over Mn stoichiometry remains to be fully harnessed. This work presents a controlled, rapid, and reproducible synthesis route to phase-pure MnSb₂Te₄ by using an optimized tellurium precursor. I investigate by powder XRD, EDX/SEM, and DC magnetization studies how varied synthetic parameters impact its structural and magnetic properties. I observe an increased stability range of ferrimagnetic MnSb₂Te₄ compared with Ref. [2], and demonstrate a clear correlation between synthesis conditions and the Tc, spanning more than 10 K across the samples. This insight into synthesis-structure-property relationship advance our goal of a topological ferromagnet with higher Tc, moving toward the quantum anomalous Hall effect at practical temperatures.

[1] Nat. Sci. Rev. 11 (2024), nwad282; [2] Phys. Rev. X 11 (2021), 021033; [3] Mater. Today Phys. 38 (2023), 101265; [4] Chem. Mater. 37 (2025), 1446-1456.

Keywords: magnetic topological insulators; solid-state synthesis; X-ray diffraction; magnetization measurements; layered van der Waals materials