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Physical properties of quaternary compounds Gd2CoAl4T2 (T= Si, Ge) single crystals |
Kaijian Huang1, Yuanshuai Sun2, Shanshan Sun2, Xiao Zhang3( ), Hechang Lei2() |
1. College of Civil Engineering, Nanjing Forestry University, Nanjing 210037, China
2. Department of Physics and Beijing Key Laboratory of Opto-electronic Functional Materials & Micro-nano Devices, Renmin University of China, Beijing 100872, China
3. State Key Laboratory of Information Photonics and Optical Communications & School of Science, Beijing University of Posts and Telecommunications, Beijing 100876, China |
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Abstract We have synthesized and investigated physical properties of two new quaternary compounds Gd2CoAl4T2 (T= Si, Ge) single crystals, which are isostructural to Tb2NiAl4Ge2 and Er2CoAl4Ge2. The most important structural feature of these materials is the anti-CaF2-type CoAl4T2 slabs. These materials show metallic behavior below 300 K and there is a long-range antiferromagnetic (AFM) transition appearing at 20 and 27 K for Gd2CoAl4Ge2 and Gd2CoAl4Si2, respectively. Resistivity and heat capacity measurements also confirm these bulk AFM transitions. Further analysis indicates that this long-range antiferromagnetism should result from the magnetic interaction between local moments of Gd3+ ions.
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| Keywords
magnetic materials
rare earth compounds
single crystal growth
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Corresponding Author(s):
Xiao Zhang,Hechang Lei
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Issue Date: 29 November 2018
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