Itinerant ferromagnet Re_4−xMn_xGe_7−δ (x = 0.9–1.5, δ = 0.42–0.44) with incommensurate chimney-ladder structure stabilised at ambient pressure

Abstract

Re4−xMnxGe7−δ (x = 0.9–1.5, δ = 0.42–0.44) is a new member of the Nowotny chimney-ladder family of compounds and features an incommensurate composite structure of transition element T (Re and...

Interplay of two magnetic sublattices in related compounds Sm2Mn1−xGa6−yGey (x = 0.1–0.3, y = 0.6–1.0) and Sm4MnGa12−yGey (y = 3.0–3.5) with different ordering of empty and filled (Ga,Ge)6 octahedra

“…It was shown for similar Mn-based intermetallic compounds that the oxidation state of Mn is close to 0 due to relatively small differences in the electronegativities of the constituent elements. 25–27 The latter also result in the pronouncedly metallic and covalent character of chemical bonding and itinerant magnetic behavior for 3d-metals, 28–33 where the effects of electron delocalisation and spin fluctuations cannot be neglected. Consequently, the overall magnetic moment may not reflect the number of unpaired electrons localised at Mn atoms.…”