The magnetism and its pressure dependence of europium interlanthanide chalcogenides

2008 
Using a novel flux growth technique, we have synthesized polycrystalline samples of the ternary interlanthanide chalcogenide system EuLn2X4 (X=S and Se) for several heavy lanthanides, Ln. The magnetic properties of these materials, all of which are antiferromagnetic below a few Kelvin, are related to the complex crystal structure. In this paper, we describe the crystal structure of EuLn2X4 and measurements of their magnetic properties, mostly at low temperatures. For X=Se and Ln=Ho, Tm, and Lu, we present the hydrostatic pressure dependence of the antiferromagnetic ordering temperatures, TN, and the low temperature (∼2K) high field magnetization to 9T. Similar results are presented for the isomorphic sulfide EuLu2S4.
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