Magnetic and related properties of Ce5CoGe2, CeCoGe and CeCo2Ge2 |
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| Affiliation: | 1. Instytut Niskich Temperatur i Badań Strukturalnych Polskiej Akademii Nauk, ul. Okólna 2, 50–422 Wrocław, Poland;2. Institutes des Sciences Chimiques de Rennes, Chimie du Solide et Matériaux, Université Rennes 1, UMR CNRS 6226, 263 Avenue du Général Leclerc, 35042 Rennes, France;1. Department of Physics, University of South Florida, Tampa, FL 33620, USA;2. Material Measurement Laboratory, National Institute of Standards and Technology, Gaithersburg, MD 20899, USA;1. Institute of Molecular Physics, Polish Academy of Sciences, Smoluchowskiego 17, 60-179 Poznań, Poland;2. Institute of Low Temperature and Structure Research, Polish Academy of Sciences, Okólna 2, 50-422 Wrocław, Poland;3. Institute of Physics, Silesian University, Uniwersytecka 4, 40-007 Katowice, Poland;1. Prokhorov General Physics Institute of RAS, Vavilov street, 38, Moscow 119991, Russia;2. Institute for High Pressure Physics, RAS, Kaluzhskoe Shosse, 14, Troitsk, Moscow 108840, Russia;3. HSE University, Myasnitskaya street, 20, Moscow 101000, Russia;4. Sechenov First Moscow State Medical University, 8-2 Trubetskaya street, Moscow 119991, Russia;5. Department of Chemistry, Moscow Lomonosov State University, Leninskie Gory, Moscow 119991, Russia;1. Department of Chemistry, Moscow State University, Leninskie Gory, House 1, Building 3, GSP-2, Moscow 119992, Russia;2. Faculty of Materials Science, Moscow State University, Leninskie Gory, House 1, Building 73, GSP-1, Moscow 119991, Russia;3. Department of Petrology, Geological Faculty Moscow State University, Leninskie Gory, Moscow 119992, Russia;4. Jiangsu Key Laboratory of Micro and Nano Heat Fluid Flow Technology and Energy Application, School of Mathematics and Physics, Suzhou University of Science and Technology, Suzhou 215009, China;5. Departamento de Física, Universidade Federal do Rio Grande do Norte, Natal 59082-970, Brazil;1. Department of Chemistry, Lomonosov Moscow State University, 119991, Moscow, Russia;2. Institute of Low Temperature and Structure Research, Polish Academy of Sciences, P.O. Box 1410, 50-950, Wrocław, Poland;1. Training-Research Center «Bryansk Physical Laboratory», Petrovsky Bryansk State University,14, Bezhitskaya St, 241036 Bryansk, Russia;2. National Research University of Electronic Technology ‘‘MIET’’, Bld. 1, Shokin Square, Zelenograd, Moscow 124498, Russia |
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| Abstract: | Magnetic susceptibility, magnetization, specific heat, electrical resistivity and thermoelectric power of polycrystalline Ce5CoGe2, CeCoGe and CeCo2Ge2 were studied at temperatures down to 2 K and in magnetic fields up to 5 T. The novel phase Ce5CoGe2 was found to be a ferromagnet with the Curie temperature of about 11 K, which exhibits in the paramagnetic region some features of a dense Kondo system with strong crystal field effect. The re-investigated CeCoGe was found to order antiferromagnetically below 4.6 K, while CeCo2Ge2 is an intermediate-valence system, in agreement with previous reports. The thermoelectric power of the latter compound is large (up to 40 μV/K) and positive in the whole temperature range studied, while in the magnetically ordered systems Ce5CoGe2 and CeCoGe it is mostly negative and distinctly smaller (down to −1.5 and −11 μV/K, respectively). |
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| Keywords: | A. Rare-earth intermetallics B. Magnetic properties B. Electrical resistance and other electrical properties B. Thermoelectric properties |
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