Physical properties of binary cerium gallides and ternary cerium-germanium gallides |
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| Affiliation: | 1. Institute of magnetism of NASU and MESU, Vernadsky blvd., 03680 Kyiv, Ukraine;2. Department of Physics, Lviv Polytechnic National University, S. Bandery Str. 12, Lviv 79013, Ukraine;3. Department of Condensed Matter Physics, Faculty of Mathematics and Physics, Charles University, Ke Karlovu 5, 121 16 Prague, Czech Republic;4. Institute of Physics AS CR v.v.i., Na Slovance 2, 182 21 Prague 8, Czech Republic |
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| Abstract: | Binary and ternary cerium-gallium germanides have been synthesized by arc melting and the existence of five binary cerium-gallium compounds and four ternary phases Ce2Ge5.4Ga1.6, Ce4Ge7Ga4, CeGeGa and Ce5GeGa2 has been confirmed from X-ray powder diffraction analysis. Low temperature magnetization and electrical resistivity data in the temperature range from 2 to 300 K reveal the absence of magnetic ordering except for CeGa, which was found to be antiferromagnetic below TN = 7 K. Effective paramagnetic moments in all cases are close to a tripositive behaviour of cerium with a small tendency for the effective moments in the binary cerium gallides to move towards smaller values when the gallium content decreases in close correspondence with the interatomic cerium distances. |
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