2021/10/31 by Robin Lefèvre, Fabian O. von Rohr, Fabian O von Rohr
Chemistry · Materials Science · Physics and Astronomy · #Biology #Chemistry #Condensed matter physics #Crystal structure #Crystallography #Electron #Fermion #Ferromagnetism #Heavy fermion #Iron-based superconductors research #Magnetic field #Magnetoresistance #Materials science #Phase (matter) #Physics #Physics of Superconductivity and Magnetism #Rare-earth and actinide compounds #Superconductivity #Type (biology) #cond-mat.mtrl-sci #cond-mat.str-el
paper · pdf · doi:10.1021/acs.chemmater.1c04328
published as Chemistry of Materials 2022 34,5 2352-2360
openalex publication_date 2022/02/25 · openalex created_date 2022/03/02 · arxiv created 2022/03/11 · arxiv updated 2022/03/14 · openalex updated_date 2026/08/01
We report on the hitherto unknown compound CeZn2-dGe2 (d approx 0.41). We find this compound to crystallize in a defect version of the well-known CaBe2Ge2 structure type. The phase forms in a Zn/In flux and with Zn-deficiency on one of its crystallographic sites. We find the compound to display uncommon localized Ce-based (4f1) ferromagnetism with a Tc = 6.6 K, a large positive magnetoresistance reaching an MR of approximately 32 % below T = 10 K, and strongly correlated electrons, as evidenced by a Kadowaki-Woods ratio A/gamma2 close to known heavy fermion compounds. The here discovered material is therefore a promising model platform for the investigation of these entangled interacting and potentially competing electronic states paired with complex crystal chemistry.