TY  - JOUR
AU  - Burghaus, J.
AU  - Sougrati, M. T.
AU  - Möchel, A.
AU  - Houben, A.
AU  - Hermann, R.
AU  - Dronskowski, R.
TI  - Local ordering and magnetism in Ga0.9Fe3.1N
JO  - Journal of solid state chemistry
VL  - 184
SN  - 0022-4596
CY  - Orlando, Fla.
PB  - Academic Press
M1  - PreJuSER-16639
SP  - 2315 - 2321
PY  - 2011
N1  - The FRM II is acknowledged for providing neutron beamtime on PGAA, and Lea Canella is acknowledged for assistance during the data acquisition. RH acknowledges support from the Helmholtz-University Young Investigator Group "Lattice Dynamics in Emerging Functional Materials". We also thank DFG for having funded this study.
AB  - 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.
KW  - J (WoSType)
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000294835700001
DO  - DOI:10.1016/j.jssc.2011.06.031
UR  - https://juser.fz-juelich.de/record/16639
ER  -