Regensburg 2025 – scientific programme
Parts | Days | Selection | Search | Updates | Downloads | Help
MM: Fachverband Metall- und Materialphysik
MM 9: Poster
MM 9.19: Poster
Monday, March 17, 2025, 18:30–20:30, P1
Magnetic anisotropy and anomalous Nernst effect in cubic Fe4N films — •Karel Knížek1, Jakub Vít1, Mariia Pashchenko1, Petr Levinský1, Kyo-Hoon Ahn1, Jaroslav Kohout2, and Imants Dirba3 — 1Institute of Physics, Czech Academy of Sciences, Prague, Czechia — 2Faculty of Mathematics and Physics, Charles University, Prague, Czechia — 3Functional Materials, Institute of Materials Science, Technical University of Darmstadt, Germany
Iron nitrides Fe(x)N are commercially important compounds because of their versatile magnetic, electrical, and mechanical properties. We have studied magnetic and transverse thermoelectric properties of Fe(4)N films prepared by magnetic sputtering. The well-known anisotropic magnetoresistance [1] and rectangular magnetization curves for thin oriented films led us to investigate magnetic anisotropy by rotating the sample in external magnetic field and measuring magnetization along the field. The signal is complex, exhibiting harmonics beyond the expected crystal symmetry. Moreover, the magnetic-field history crucially impacts the anisotropy. The results are quite distinct below and above the metamagnetic phase transition near 50K. The results of the magnetic measurements are compared with anomalous Nernst effect experiments and DFT calculations.
[1] M. Tsunoda et al., Applied Physics Express 2, 083001 (2009).
Keywords: anomalous Nernst effect; Fe4N; thin film; magnetic anisotropy