Neutron powder diffraction of rhombohedral Y{sub 2}Fe{sub 17} and Y{sub 2}Fe{sub 17}N{sub 3.1}
- Faculty of Integrated Arts and Sciences, Hiroshima University, Higashi-hiroshima 724 (Japan)
- Department of Applied Physics, Tohoku University, Sendai 980-77 (Japan)
- Advanced Science Research Center, Japan Atomic Energy Research Institute, Tokai, Ibaraki 319-11 (Japan)
High resolution neutron powder diffraction experiments were carried out on rhombohedral Y{sub 2}Fe{sub 17} and the nitride Y{sub 2}Fe{sub 17}N{sub 3.1} at 10 K. The diffraction data were analyzed by the recently refined Rietveld method. The results obtained indicate that nitrogen atoms fully occupy the 9e site (99.5{percent}) and that a small amount of N atoms locate at the 18g site (3.9{percent}). The introduction of N atoms into Y{sub 2}Fe{sub 17} leads to strong modification of the Fe magnetic moments. The magnetic moment of the 18f-Fe atoms which are the nearest to the 9e-N atoms in nitride is the lowest value ({approximately}2.0{mu}{sub B}), whereas the 6c-Fe atoms being the farthest from the 9e-N atoms have the highest moment ({approximately}2.9{mu}{sub B}). The difference of Fe moments on nonequivalent sites is discussed on the basis of the Fe-Fe and Fe-N bond distances. The obtained results are compared with the results of electronic band-structure calculation. {copyright} {ital 1997} {ital The American Physical Society}
- OSTI ID:
- 496726
- Journal Information:
- Physical Review, B: Condensed Matter, Vol. 55, Issue 17; Other Information: PBD: May 1997
- Country of Publication:
- United States
- Language:
- English
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