Regensburg 2025 – wissenschaftliches Programm
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DS: Fachverband Dünne Schichten
DS 13: Poster
DS 13.23: Poster
Donnerstag, 20. März 2025, 18:00–20:00, P1
Tuning high-TC ferromagnetism and perpendicular magnetic anisotropy in van der Waals magnet Cr1+δTe2 — •Laura Pflügl, Pia Henning, Anna Tschesche, and Jasnamol Palakkal — Institute of Materials Physics, Georg-August-University of Göttingen, Friedrich-Hund-Platz 1, 37077 Göttingen, Germany
In recent years, chromium tellurides (Cr1+δTe2) have gained significant interest due to their promising characteristics, such as ferromagnetic ground states with tunable transition temperatures and perpendicular magnetic anisotropy (PMA) which open up various possible applications in spintronics [1]. However, the fabrication of high-quality stochiometric and epitaxial Cr1+δTe2 thin films is difficult and calls for advanced synthesis techniques. Using a hybrid setup combining pulsed laser deposition for Cr and a molecular beam source for Te, we deposited Cr1+δTe2 thin films with precise stoichiometry control [2]. Changes of the magnetism were previously reported in Cr1+δTe2 due to extreme air-sensitivity and nonself-limited oxidation [3]. Since our films are epitaxially stabilized on a substrate, they are free from defect introduction and offer air stability by forming a passive surface oxide layer. We will address the ongoing challenges during the growth of this material and put forward effective tuning by varying deposition control parameters.
[1] Y. Fujisawa et al., Phys. Rev. Mater., 4 (2020) 114001.
[2] A. Tschesche, et al., Preprint on Research Square, https://doi.org/10.21203/rs.3.rs-4861088/v1
[3] A. Coughlin et al., ACS Materials Letters, 5 (2023) 1945-1953.
Keywords: Thin films; Ferromagnetism; Perpendicular Magnetic Anisotropy; Pulsed Laser Deposition; Molecular Beam Epitaxy