Itinerant Ferromagnet RhFe3N: Advanced Synthesis and Fe-57 Mossbauer Analysis

作者：Houben Andreas; Sepelak Vladimir; Becker Klaus Dieter; Dronskowski Richard^*

来源：Chemistry of Materials, 2009, 21(5): 784-788.

DOI：10.1021/cm803004v

A novel two-step route for the synthesis of RhFe3N is presented that yields the target material with a significantly improved phase purity. Except from Fe0.5Rh0.5, the absence of other side products is exemplified on the basis of powder XRD, REM/EDX measurements, and Mossbauer investigations. As predicted from density-functional theory calculations, both Rietveld refinement and Mossbauer analysis show that the Rh atom within RhFe3N exclusively occupies Wyckoff position la but not 3c of the anti-perovskite-like structure in space group Pm (3) over barm, and the rhodium occupation of the la site is around 80%, yielding a precise formula of (1a)(Rh0.8Fe0.2)(3c)(Fe-3)N-1b. The decomposition temperature of the nitride is estimated from temperature-dependent X-ray measurements to lie around 530 degrees C.

• 出版日期2009-3-10