Article (Scientific journals)
Local ordering and magnetism in Ga0.9Fe3.1N
Burghaus, Jens; Sougrati, Moulay T.; Moechel, Anne et al.
2011In Journal of Solid State Chemistry, 184 (9), p. 2315-2321
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Abstract :
[en] Prior investigations of the ternary nitride series Ga1-xFe3+xN (0 <= x 1) have indicated a transition from ferromagnetic gamma'-Fe4N to antiferromagnetic ``GaFe3N''. The ternary nitride ``GaFe3N'' has been magnetically and spectroscopically reinvestigated in order to explore the weakening of the ferromagnetic interactions through the gradual incorporation of gallium into gamma'-Fe4N. A hysteretic loop at RI reveals the presence of a minority phase of only 0.1-0.2 at\%, in accord with the sound two-step synthesis. The composition of the gallium-richest phase ``GaFe3N'' was clarified by Prompt Gamma-ray Activation Analysis and leads to the berthollide formula Ga0.91(1)Fe3.09(10)N1.05(7). Magnetic measurements indicate a transition around 8 K, further supported by Mossbauer spectral data. The weakening of the ferromagnetic coupling through an increasing gallium concentration is explained by a simple Stoner argument. In Ga0.9Fe3.1N the presence of iron on the gallium site affects the magnetism by the formation of 13-atom iron clusters. (C) 2011 Elsevier Inc. All rights reserved.
Disciplines :
Chemistry
Author, co-author :
Burghaus, Jens
Sougrati, Moulay T.
Moechel, Anne
Andreas, Houben
Hermann, Raphaël ;  Université de Liège - ULiège > Département de chimie (sciences) > Département de chimie (sciences)
Dronskowski, Richard
Language :
English
Title :
Local ordering and magnetism in Ga0.9Fe3.1N
Publication date :
2011
Journal title :
Journal of Solid State Chemistry
ISSN :
0022-4596
eISSN :
1095-726X
Publisher :
Elsevier, Atlanta, United States - California
Volume :
184
Issue :
9
Pages :
2315-2321
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 14 December 2012

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