Self-Intercalation as Origin of High-Temperature Ferromagnetism in Epitaxially Grown Fe_{5}GeTe_{2} Thin Films.

The role of self-intercalation in 2D van der Waals materials is key to the understanding of many of their properties. Here we show that the magnetic ordering temperature of thin films of the 2D ferromagnet Fe_{5}GeTe_{2} is substantially increased by self-intercalated Fe that resides in the van der Waals gaps. The epitaxial films were prepared by molecular beam epitaxy and their magnetic properties explored by element-specific x-ray magnetic circular dichroism that showed ferromagnetic ordering up to 375 K.

Synthesis and Crystal Structures of the First Antimony(III) Aziridinides.

The first antimony(III) aziridinyl derivatives are reported. Treatment of anhydrous SbCl with N-lithioaziridine Li(Azn) (Azn = NCH) afforded the structurally unique heterobimetallic lithium/antimony(III) amide complex [LiSb(μ-Cl)(μ-Azn)(THF)] (1). Homoleptic Sb(Azn) (2) has become available for the first time through an amide group exchange reaction between Sb(NMe) and 3 equiv of aziridine.