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MA: Fachverband Magnetismus

MA 46: Poster II

MA 46.18: Poster

Donnerstag, 21. März 2024, 15:00–18:00, Poster C

Mössbauer spectroscopy on CeFeSb₃ — •Felix Seewald¹, Manuel Schulze², Thomas Doert², Michael Ruck², and Hans-Henning Klauss¹ — ¹Institut für Festkörper und Materialphysik, TU Dresden, Germany — ²Fakultät für Chemie und Lebensmittelchemie, TU Dresden, Germany

Rare earth transition metal antimony systems exhibit a wide range of interesting magnetic properties. For example, in R₃Fe₃Sb₇ (R = Pr, Nd) we find a complex magnetic structure with R-Fe interplay^[1].

The CeFeSb₃ structure consists of layers of iron centered FeSb₂ octahdera alternating with a Sb square lattice in between Ce layers. The Mössbauer spectrum at room temperature shows a single iron site exhibiting quadrupole splitting due to the presence of an electric field gradient (EFG). The center shift at room temperature is 0.469(3)  mms⁻¹ relative to α-iron with an EFG principle component of V_zz = ± 19.1(4) VÅ⁻².

Surprisingly even at 4.2 K no static magnetic hyperfine field is detected by Mössbauer, i.e. the spectrum still consists of a single quadrupole split iron site.

We will compare our findings with ferromagnetic order in other transition metal antimony systems.
[1] Falk Pabst, Sabrina Palazzese et. al., Advanced materials

Keywords: Mössbauer; rare earth; transition metal