Substitution studies of Mn and Fe in Ln6W4Al43 (Ln=Gd, Yb) and the structure of Yb6Ti4Al43
| Autor: | Joseph Prestigiacomo, Shane Stadler, Jacob D. McAlpin, LaRico J. Treadwell, Julia Y. Chan, Pilanda Watkins-Curry |
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| Rok vydání: | 2014 |
| Předmět: |
Materials science
Magnetism Doping Intermetallic Crystal growth Condensed Matter Physics Magnetic susceptibility Electronic Optical and Magnetic Materials Inorganic Chemistry Magnetization Crystallography Ferromagnetism Materials Chemistry Ceramics and Composites Physical and Theoretical Chemistry Anisotropy |
| Zdroj: | Journal of Solid State Chemistry. 210:267-274 |
| ISSN: | 0022-4596 |
| DOI: | 10.1016/j.jssc.2013.11.021 |
| Popis: | The synthesis and characterization of Mn- and Fe-substituted Ln6W4Al43 (Ln=Gd, Yb) and Yb6Ti4Al43 are reported. The compounds adopt the Ho6Mo4Al43 structure type with lattice parameters of a~11 A and c~17.8 A with structural site preferences for Mn and Fe. The magnetization of Yb6W4Al43 is sensitive to Mn and Fe doping, which is evident by an increase in the field dependent magnetization. Gd6W4Al43, Gd6W4Al42.31(11)Mn0.69(11), and Gd6W4Al41.69(12)Fe1.30(12) order antiferromagnetically in the ab- and c-directions at 15, 14, and 13 K, respectively, with positive Weiss constants, suggesting the presence of ferromagnetic exchange interactions. Anisotropic magnetization data of Gd6W4Al43−yTy (T=Mn, Fe) analogs are discussed. |
| Databáze: | OpenAIRE |
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