Research on the Structure of GdFeMn Compound

Shi Qian Zhao; Lei Ma; Liang Zhou; Tao Liu; Yong Bin Guo

doi:10.4028/www.scientific.net/AMR.1142.14

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 1142Research on the Structure of GdFeMn Compound

Research on the Structure of GdFeMn Compound

Abstract:

The crystal structure of GdFeMn alloy has been investigated by using X-ray powder diffraction (XRD) followed by Rietveld refinement technique, differential thermal analysis (DTA) and scanning electron microscopy (SEM) equipped with energy dispersive X-ray spectroscopy (EDS) techniques. XRD results showed that annealed GdFeMn alloy was a single phase of Gd₆(Fe_0.5Mn_0.5)₂₃ compound, with Th₆Mn₂₃-structure. SEM/EDS results and Rietveld refinement revealed that GdFeMn alloy was not really a new ternary compound as reported, but a solid solution Gd₆(Fe_0.5Mn_0.5)₂₃ which was only a point between Gd₆Fe₂₃ and Gd₆Mn₂₃. It was also found from DTA measurement that a reaction, Gd (Fe_0.5Mn_0.5)₂ → liquid (rich Gd) + Gd₆(Fe_0.5Mn_0.5)₂₃, had taken place above 650.81 ^oC, and the educed Gd existed in educed part of GdFeMn sample. The results demonstrated the real structure of the GdFeMn compound as reported was Gd₆(Fe_0.5Mn_0.5)₂₃ compound.

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Advanced Materials Research (Volume 1142)

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14-18

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https://doi.org/10.4028/www.scientific.net/AMR.1142.14

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January 2017

Authors:

Shi Qian Zhao, Lei Ma, Liang Zhou, Tao Liu, Yong Bin Guo

Keywords:

Crystal Structure, Solid Solution, Ternary Compound

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