Crystal structure,electrical, and magnetic properties of the Sm2Cu0.8Ge3 compound |
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| Affiliation: | 1. Department of Physics, National Taiwan University, Taipei 10617, Taiwan, ROC;2. Center for Condensed Matter Sciences, National Taiwan University, Taipei 10617, Taiwan, ROC;1. School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing, 210094, China;2. National Laboratory of Solid State Microstructures, Nanjing University, Nanjing, 210093, China;1. Department of Physics, College of Science, Qassim University, P.O. 4466, Buraidah 51452, Saudi Arabia;2. Laboratoire de Physico-Chimie des Matériaux Minéraux et leurs Applications, Centre National de Recherches en Sciences des Matériaux, B. P. 95, Hammam-Lif 2050, Tunisia;1. Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei, 230031, China;2. University of Science and Technology of China, Hefei, 230026, China;3. Collaborative Innovation Center for Petrochemical New Materials, Anhui Key Laboratory of Functional Coordination Compounds, School of Chemistry and Chemical Engineering, Anqing Normal University, Anqing, 246011, China;4. High Magnetic Field Laboratory, Chinese Academy of Sciences, Hefei, 230031, China;1. Department of Chemistry, Moscow State University, 119991, Moscow, Russia;2. Research Center for Functional Materials, National Institute for Materials Science, Namiki 1-1, Tsukuba, Ibaraki 305-0044, Japan;3. School of Engineering, Ural Federal University, 620002, Ekaterinburg, Russia;4. Institute of Physics and Technology, Ural Federal University, 620002, Ekaterinburg, Russia;1. Institute for Rare Earth Magnetic Materials and Devices (IREMMD), Institute of Engineering & Research, Jiangxi University of Science and Technology, Ganzhou 341000, China;2. School of Material Science and Engineering, Nanchang Hangkong University, Nanchang 330063, China |
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| Abstract: | The crystal structure, electrical, and magnetic properties of the new ternary compound Sm2Cu0.8Ge3 have been investigated using powder X-ray diffraction, electrical resistivity, and magnetic susceptibility measurements. X-ray diffraction patterns reveal that this compound crystallizes in a tetragonal α-ThSi2 structure (space group I41/amd) with lattice parameters a = 0.413(1) nm and c = 1.420(3) nm. The irreversibility of the zero field cooled and field cooled dc magnetization data reveals the occurrence of spin glass transition with the spin freezing temperature Tf ∼ 8.5 K in this compound. Ac susceptibility and isothermal remanent magnetization data also confirm the existence of the spin glass phase. In addition, a broad maximum is observed in the ρ(T) curve near Tf. The spin glass phase is ascribed to the formation of random interaction between the Sm ions due to the irregular distribution of Cu and Ge atoms as well as the deficiency of the occupancy on the 8e crystallographic sites of the sample. |
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| Keywords: | A. Functional alloys B. Magnetic properties C. Melting F. Diffraction |
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