Regensburg 2025 – scientific programme
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MA: Fachverband Magnetismus
MA 22: Caloric Effects in Ferromagnetic Materials
MA 22.4: Talk
Wednesday, March 19, 2025, 10:15–10:30, H19
Magnetocrystalline anisotropy of magnetocaloric Fe2AlB2 single crystals — •Nicolas Josten1, Ralf Meckenstock1, Anna Semisalova1, Benedikt Beckmann2, Konstantin Skokov2, Oliver Gutfleisch2, Hanna Pazniak3, Thierry Ouisse3, Michael Farle1, and Ulf Wiedwald1 — 1Faculty of Physics and Center for Nanointegration (CENIDE), University Duisburg Essen, Germany — 2Functional Materials, Institute of Materials Science, Technical University of Darmstadt, Germany — 3LMGP, Grenoble INP, CNRS, Université Grenoble Alpes, France
Fe2AlB2 is a low-cost, low weight and easily synthesized material composed of abundant elements for magnetocaloric applications near room temperature [1]. It is a ferromagnetic MAB phase with an orthorhombic crystal structure and a Curie-temperature TC = 274 K [2]. The low crystal symmetry of Fe2AlB2 leads to a significant magnetocrystalline anisotropy up to around 1 MJ·m−3 at 10 K. We determined the temperature-dependent magnetocrystalline anisotropy constants of a bulk Fe2AlB2 single crystal using the Sucksmith-Thomson method and broadband ferromagnetic resonance measured along principal crystallographic directions. Both methods show perfect quantitative agreement.
Funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) * Project-ID 405553726 * SFB/TRR 270.
[1] B. Beckmann et al. J. Appl. Phys. 133, 173903 (2023)
[2] T. N. Lamichhane et al. Phys. Rev. Mater. 2, 084408 (2018)
Keywords: Ferromagnetism; Ferromagnetic Resonance; Magnetometry; Magnetocalorics; MAB-Phases