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Effects of combined substitution of Dy and Mo or Si on the crystal structures and magnetic properties of Nd1−y Dy y Fe11−x TiM x (M = Mo, Si) compounds

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Abstract

A series of Nd1−y Dy y Fe11−x TiMx (M = Mo, Si) alloys have been prepared by arc melting and studied by X-ray diffraction and neutron diffraction. All samples are found to crystallize in the ThMn12-type structure. The lattice parameters a and c and unit cell volume V of Nd0.5Dy0.5Fe11−x TiMo x alloys increase linearly with increasing content of Mo (x), while the lattice parameters a and c and unit cell volume V of Nd0.5Dy0.5Fe11−x TiSi x alloys decrease linearly with increasing content of Si(x). In Nd y Dy1−y Fe11−x TiM x (M = Mo, Si) compounds, Ti and Mo atoms preferentially occupy the 8i sites and Si atoms preferentially occupy the 8j and 8f sites. Magnetic measurements show that the substitution of Fe by either Mo or Si leads to a decrease in the Curie temperature.

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Authors and Affiliations

  1. College of Chemistry and Chemical Engineering, Graduate University of Chinese Academy of Sciences, Beijing, 100049, China

    XiangJun Li, Na Zheng, ZhongBo Hu & ZhuoBin Yuan

Authors
  1. XiangJun Li
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  2. Na Zheng
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Correspondence to XiangJun Li or ZhongBo Hu.

Additional information

Supported by the National Natural Science Foundation of China (Grant No. 20775088) and the Foundation of State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences (Grant No. KF2008-06)

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Li, X., Zheng, N., Hu, Z. et al. Effects of combined substitution of Dy and Mo or Si on the crystal structures and magnetic properties of Nd1−y Dy y Fe11−x TiM x (M = Mo, Si) compounds. Sci. China Ser. B-Chem. 52, 1097–1103 (2009). https://doi.org/10.1007/s11426-009-0148-2

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  • DOI: https://doi.org/10.1007/s11426-009-0148-2

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