Local ordering and magnetism in Ga0.9Fe3.1N

Jens Burghaus; Moulay T. Sougrati; Anne Möchel; Andreas Houben; Raphaël P. Hermann; Richard Dronskowski

doi:10.1016/j.jssc.2011.06.031

Local ordering and magnetism in Ga_0.9Fe_3.1N

Jens Burghaus, Moulay T. Sougrati, Anne Möchel, Andreas Houben, Raphaël P. Hermann, Richard Dronskowski

Research output: Contribution to journal › Article › peer-review

22 Scopus citations

Abstract

Prior investigations of the ternary nitride series Ga_1xFe _3xN (0≤x≤1) have indicated a transition from ferromagnetic γ′-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 γ′-Fe₄N. A hysteretic loop at RT reveals the presence of a minority phase of only 0.10.2 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 Ga_0.91(1)Fe_3.09(10)N_1.05(7). Magnetic measurements indicate a transition around 8 K, further supported by Mössbauer spectral data. The weakening of the ferromagnetic coupling through an increasing gallium concentration is explained by a simple Stoner argument. In Ga_0.9Fe_3.1N, the presence of iron on the gallium site affects the magnetism by the formation of 13-atom iron clusters.

Original language	English
Pages (from-to)	2315-2321
Number of pages	7
Journal	Journal of Solid State Chemistry
Volume	184
Issue number	9
DOIs	https://doi.org/10.1016/j.jssc.2011.06.031
State	Published - Sep 2011
Externally published	Yes

Funding

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.

Keywords

Chemical synthesis
Magnetism
Mößbauer spectroscopy
Nitride
Stoner criterion

Access to Document

10.1016/j.jssc.2011.06.031

Cite this

@article{a1198b90f43146a1b3ce2d85c0a35a87,

title = "Local ordering and magnetism in Ga0.9Fe3.1N",

abstract = "Prior investigations of the ternary nitride series Ga1xFe 3xN (0≤x≤1) have indicated a transition from ferromagnetic γ′-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 γ′-Fe4N. A hysteretic loop at RT reveals the presence of a minority phase of only 0.10.2 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 M{\"o}ssbauer 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.",

keywords = "Chemical synthesis, Magnetism, M{\"o}{\ss}bauer spectroscopy, Nitride, Stoner criterion",

author = "Jens Burghaus and Sougrati, \{Moulay T.\} and Anne M{\"o}chel and Andreas Houben and Hermann, \{Rapha{\"e}l P.\} and Richard Dronskowski",

year = "2011",

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T1 - Local ordering and magnetism in Ga0.9Fe3.1N

AU - Burghaus, Jens

AU - Sougrati, Moulay T.

AU - Möchel, Anne

AU - Houben, Andreas

AU - Hermann, Raphaël P.

AU - Dronskowski, Richard

PY - 2011/9

Y1 - 2011/9

N2 - Prior investigations of the ternary nitride series Ga1xFe 3xN (0≤x≤1) have indicated a transition from ferromagnetic γ′-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 γ′-Fe4N. A hysteretic loop at RT reveals the presence of a minority phase of only 0.10.2 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 Mössbauer 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.

AB - Prior investigations of the ternary nitride series Ga1xFe 3xN (0≤x≤1) have indicated a transition from ferromagnetic γ′-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 γ′-Fe4N. A hysteretic loop at RT reveals the presence of a minority phase of only 0.10.2 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 Mössbauer 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.

KW - Chemical synthesis

KW - Magnetism

KW - Mößbauer spectroscopy

KW - Nitride

KW - Stoner criterion

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