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MA: Fachverband Magnetismus
MA 52: Poster Magnetism III
MA 52.36: Poster
Thursday, March 12, 2026, 15:00–17:00, P4
FMR in chiral Mn2TiO4 — •Amruthavsarshini Anand1, Rajendra Loke1, Ahmed Rasheed1, Agustinus Agung Nugroho2, and Joachim Hemberger1 — 1Institute of Physics II, University of Cologne, 50937 Cologne, Germany — 2Institut Teknologi Bandung, Bandung 40116, Indonesia.
Ferromagnetic resonance (FMR) is a powerful technique for probing the dynamic magnetic properties of materials. In this study, we investigate FMR in Mn2TiO4, an inverse spinel oxide. The magnetic Mn2+ ions occupy tetrahedrally coordinated (A) sites and half of octahedrally coordinated (B) sites. The space group P4322 possesses a chiral axis along c, which via spin orbit coupling influences the magnetic resonance.
FMR measurements performed across different frequencies allow us to extract resonance fields and linewidths for different crystal orientations. The data can be analysed using Kittel’s formula revealing magnetic anisotropy constants and g-factor, while linewidth fitting provides quantitative values of the Gilbert damping parameter. We also utilise circularly polarized microwave excitation to directly address chirality and the resulting non-reciprocity of the magnetic response.
Keywords: Ferromagnetic resonance (FMR); Chiral magnetism; Magnetic anisotropy; Gilbert damping; Circularly polarized microwaves