Regensburg 2025 – scientific programme

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MA: Fachverband Magnetismus

MA 31: Poster II

MA 31.47: Poster

Wednesday, March 19, 2025, 17:00–19:30, P1

Site-selective substitution effects on the magnetic phase diagram of multiferroic Fe₂Mo₃O₈ — Lilian Prodan¹, •Dorina Croitori², Irina G. Filippova², Sergiu Shova³, Vladimir Tsurkan^1,2, and Istvan Kezsmarki¹ — ¹University of Augsburg — ²Moldova State University — ³Romanian Academy

Antiferromagnetic materials hold great promise for the design of ultra-fast and energy-efficient spintronic devices. Therefore, understanding the robustness of crystals, their magnetic structures, and their manipulation is of high importance. Here, we report the effect of site-selective substitution of Zn²⁺ for Fe²⁺ ions on the crystal structure, magnetic and thermodynamic properties of the multiferroic Fe₂Mo₃O₈. We found the strong preference of Zn to occupy the tetragonal positions for substitution concentrations 0 ≥ x ≤ 1.3. This contrasts the previously reported results for related system Co₂Mo₃O₈ [1]. Site-selective substitution affects the magnetic phase diagram of Fe₂Mo₃O₈ influencing both the intra and inter-layer exchange interactions. This leads to the stabilization of the FiM phase for x ≥ 0.2 and to the decrease of T_C with increasing the Zn content. [1]. L. Prodan, I. Filippova, et al. Phys Rev B 106 (2022) 174421.

Keywords: Antiferromagnetic materials; Multiferroics; Substitution effects