High-Pressure High-Temperature Synthesis of ϵ-Fe2IrN0.24

A high‐pressure high‐temperature synthesis involving initial reaction, nitrogen depletion and annealing yields a new ϵ‐type iron iridium nitride. Energy dispersive X‐ray spectroscopy of metallographic samples evidence a main phase having a molar metal ratio of Fe:Ir = 2:1 within experimental error....

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Veröffentlicht in:Zeitschrift für anorganische und allgemeine Chemie (1950) 2014-04, Vol.640 (5), p.814-818
Hauptverfasser: Guo, Kai, Rau, Dieter, Schnelle, Walter, Burkhardt, Ulrich, Niewa, Rainer, Schwarz, Ulrich
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Sprache:eng
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Zusammenfassung:A high‐pressure high‐temperature synthesis involving initial reaction, nitrogen depletion and annealing yields a new ϵ‐type iron iridium nitride. Energy dispersive X‐ray spectroscopy of metallographic samples evidence a main phase having a molar metal ratio of Fe:Ir = 2:1 within experimental error. Chemical analyses and thermogravimetric measurements quantify the nitrogen content to 1.07 wt % (x = 0.24) and 1.2 wt % (x = 0.27), respectively. Above 750 K, the phase Fe2IrN0.24 decomposes into solid solutions ϵ‐Fe(Ir) and γ‐Fe(Ir) involving the release of N2 at ambient pressure. Magnetic susceptibility data suggest long‐range antiferromagnetic ordering at TN = 27 K.
ISSN:0044-2313
1521-3749
DOI:10.1002/zaac.201300609