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Vol. 28 No. 6 (2016): Vol 28 Issue 6

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Isothermal Cross-Sections of Gd-Fe-Ge System at 800 °C and Magnetic Properties of Gd117Fe52Ge112 Compound

https://doi.org/10.14233/ajchem.2016.19688
Mosbah Jemmali
Laboratoire des Sciences des Matériaux et de l'Environnement, Faculté des Sciences de Sfax, Université de Sfax, Tunisia; Chemistry Departement, College of Science and Arts, Qassim University, P.O. Box 53, Al-Rass, Saudi Arabia
Siwar Walha
Laboratoire des Sciences des Matériaux et de l'Environnement, Faculté des Sciences de Sfax, Université de Sfax, Tunisia
Rached Ben Hassen
Unite de Recherche de Chimie des Matériaux, ISSBAT. Université de Tunis El Manar. 9, Avenue Dr. Zoheir Safi, 1006-Tunis, Tunisia
Henri Noël
Laboratoire de Chimie de Solide et Matériaux, Sciences Chimiques de Rennes, UMR 6226 CNRSUniversité Rennes 1, Avenue du Général Leclerc 35042 Rennes, France

Corresponding Author(s) : Mosbah Jemmali

jmosbah@yahoo.fr

Asian Journal of Chemistry, Vol. 28 No. 6 (2016): Vol 28 Issue 6

Abstract

The isothermal section of the phase diagram of the Gd-Fe-Ge ternary system at 800 °C was investigated by X-ray powder diffraction and scanning electron microscope-energy dispersive X-ray spectroscopy. Three intermediate solid solutions have been identified or confirmed: one lacunaire GdFexGe2 (CeNiSi2-type of structure space group P6/mmm) and two by substitition GdFe4-xGex (AlB4-type of structure space group I4/mmm) and GdFe12-xGex (YCo6Ge6-type of structure space group P6/mmm) and one ternary compound Gd117Fe52Ge112 (Tb117Fe52Ge112-type of structure space group Fm-3m). The magnetic properties of Gd117Fe52Ge112 compound is ferromanetic at 89 K have been studied. The 800 °C phase diagram of this system consists of 20 three-phases regions.

Keywords

Magnetic Intermetallic compounds Phase diagram X-ray diffraction
Jemmali, M., Walha, S., Hassen, R. B., & Noël, H. (2016). Isothermal Cross-Sections of Gd-Fe-Ge System at 800 °C and Magnetic Properties of Gd117Fe52Ge112 Compound. Asian Journal of Chemistry, 28(6), 1330–1334. https://doi.org/10.14233/ajchem.2016.19688
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