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Title: Effect of Li and Mg substitution on the crystal structure and magnetism of the REGa2 (RE = Ce and Eu) and EuGa4 compounds
Authors: Iyer, Abishek K.
Balisetty, Lahari
Sarkar, Sumanta
Peter, Sebastian C.
Keywords: Physical Chemistry
Materials Science
Metallurgy & Metallurgical Engineering
Crystal Chemistry
Europium Lithium Gallium
Ternary Gallides
Issue Date: 2014
Publisher: Elsevier Science Sa
Citation: Iyer, AK; Balisetty, L; Sarkar, S; Peter, SC, Effect of Li and Mg substitution on the crystal structure and magnetism of the REGa2 (RE = Ce and Eu) and EuGa4 compounds. Journal of Alloys And Compounds 2014, 582, 305-312,
Journal of Alloys And Compounds
Abstract: The compounds CeGa2, Ce0.82Mg0.50Ga1.68, Eu(Mg/Li)(x)Ga2-x (0 <= x <= 0.4) and Eu(Mg/Li)(x)Ga4-x(0 <= x <= 0.73) were synthesized and characterized by X-ray diffraction. CeGa2 and Ce0.82Mg0.50Ga1.68 crystallize in the AlB2 structure type with P6/mmm space group. The structure is composed of infinite arrays of planar hexagonal Ga atoms stacked along the [001] direction and the Ce atoms are sandwiched between them. Eu(Mg/Li)(x)Ga2-x (0 <= x <= 0.4) crystallize in the KHg2 structure type with Imma space group and consists of the hexagonal rings of M (Li/Mg + Ga) atoms connected along the [100] plane forming a puckered network with voids occupied by two Eu atoms. The Eu(Mg/Li)(x)Ga4-x (0 <= x <= 0.73) compounds crystallize in the BaAl4 structure type having I4/mmm space group. In Eu(Mg/Li)(x)Ga4-x, the Eu atom occupies the edge and the body centered position of the unit cell while the Ga and M (Li/Mg + Ga) atoms forms a 3D polyanionic framework. Magnetic susceptibility of CeGa2, EuGa2, EuGa4 and their corresponding Li/Mg analogs are discussed. (C) 2013 Elsevier Ltd. All rights reserved.
Description: Restricted Access
ISSN: 0925-8388
Appears in Collections:Research Papers (Sebastian C. Peter)

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