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TT: Fachverband Tiefe Temperaturen

TT 80: Correlated Electrons: Poster

TT 80.3: Poster

Thursday, March 21, 2024, 15:00–18:00, Poster E

Electron Spin Resonance of Eu on triangular layers in EuT₂P₂ (T=Mn, Zn, Cd). — •Jörg Sichelschmidt¹, Pierre Chailloleau¹, Sarah Krebber², Asmaa El Mard², Kristin Kliemt², and Cornelius Krellner² — ¹Max-Planck-Insitut für Chemische Physik fester Stoffe, 01187 Dresden — ²Physikalisches Institut, Goethe-Universität Frankfurt, 60438 Frankfurt

Eu-based 122 systems in the trigonal CaAl₂Si₂ structure haven proven to show unusual transport properties such as anomalous Hall effect or colossal magnetoresistance, in the vicinity of an antiferromagnetically ordered state [1,2]. We investigated the electron spin resonance (ESR) of Eu²⁺ in EuT₂P₂ (T=Mn, Zn, Cd) single crystals. The temperature dependencies of ESR linewidth and resonance shift show a similar behaviour when approaching the Eu-ordered state – a divergence towards T_N, indicating the growing importance of magnetic correlations and the build-up of internal magnetic fields.

[1] S. Krebber et al. Phys. Rev. B 108, 045116 (2023).

[2] X. Cao et al., Phys. Rev. Res. 4, 023100 (2022).

Keywords: ESR; CMR