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Dresden 2020 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 50: Permanent Magnets

MA 50.9: Vortrag

Donnerstag, 19. März 2020, 17:15–17:30, HSZ 101

Manipulation of intrinsic properties of CeFe11Ti: Experiment and Theory — •Semih Ener1, Anna Galler2, Fernando Maccari1, Imants Dirba1, Konstantin P. Skokov1, Silke Biermann2, Leonid Pourovskii2, and Oliver Gutfleisch11Functional Materials, Department of Materials Science, Technische Universität Darmstadt, Darmstadt/Germany — 2Centre de Physique Théorique, CNRS, Ecole Polytechnique, Institut Polytechnique de Paris, Palaiseau/France

The abundance of rare-earth (RE) elements like Nd and Sm motivates researchers to look for alternative free-RE (like Ce, Pr, La) material systems. Interesting candidates are ThMn12-phases where the RE concentration is lower in comparison to the benchmark material systems Nd2Fe14B and Sm2Fe17. The CeFe12 phase is not stable in bulk form, so additional elements need to be substituted for Fe to stabilize the phase. Among the alternative stabilization elements, titanium is a promising candidate due to its low composition ratio (approx. 7 at.% for stabilization of the ThMn12-phase in bulk) for ternary concentrations. In this work, we carried out composition and thermal treatment optimization for the Ce1+xFe11Ti series and investigated the magnetic properties under positive and negative pressures. In addition to the experiments, first-principles dynamical mean-feld theory (DMFT) calculations were carried out. Intrinsic properties were investigated at different temperatures and will be presented in this work.

This work is supported by the DFG-ANR project RE-MAP (Project No. 316912154).

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