Site occupancies in the R 2-x Fe 14+2x Si 3 (R = Ce, Nd, Gd, Dy, Ho, Er, Lu, Y) compounds studied by Mössbauer spectroscopy A. Błachowski 1 , K. Ruebenbauer 1 , J. Przewoźnik 2 , J. Żukrowski 2 , D. Sitko 3 , N.-T.H. Kim-Ngan 3 , A.V. Andreev 4 1 Mössbauer Spectroscopy Division, Institute of Physics, Pedagogical University, Kraków, Poland 2 Solid State Physics Department, Faculty of Physics and Applied Computer Science, AGH University of Science and Technology, Kraków, Poland 3 Surface Physics Division, Institute of Physics,
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Site occupancies in the R 2-x Fe 14+2x Si 3 (R = Ce, Nd, Gd, Dy, Ho, Er, Lu, Y) compounds studied by Mössbauer spectroscopy A. Błachowski 1, K. Ruebenbauer.
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Site occupancies in the R2-xFe14+2xSi3
(R = Ce, Nd, Gd, Dy, Ho, Er, Lu, Y) compounds studied by Mössbauer spectroscopy
A. Błachowski 1, K. Ruebenbauer 1, J. Przewoźnik 2, J. Żukrowski 2, D. Sitko 3, N.-T.H. Kim-Ngan 3, A.V. Andreev 4
1 Mössbauer Spectroscopy Division, Institute of Physics, Pedagogical University, Kraków, Poland
2 Solid State Physics Department, Faculty of Physics and Applied Computer Science,
AGH University of Science and Technology, Kraków, Poland
3 Surface Physics Division, Institute of Physics, Pedagogical University, Kraków, Poland
4 Institute of Physics, Academy of Sciences, Prague, Czech Republic
R2Fe17
R2Fe14Si3
Y Ce Nd Sm Gd Tb Dy Ho Er Tm Lu
Crystal structure
4 + 1(?) iron crystallographic positions
R2-xFe14+2xSi3
Iron hyperfine sites
7 + 1(?)iron magnetic positions
X-ray powder diffraction
Crystallographic Magnetic
R2-xFe14+2xSi3
Regular iron site occupanciesContribution (at. % Fe)
Ce Nd Gd Dy Ho Er Lu Y
C
ontr
ibut
ion
(at.
% F
e)
mmcPmR /6 3 3
6c 4f
9d 6g
18f or 18h 12j or 12k
18h or 18f 12k or 12j
R2-xFe14+2xSi3
Non-stoichiometry parameter2x
Ce Nd Gd Dy Ho Er Lu Y
R2-xFe14+2xSi3
Conclusions
Si atoms avoid
6c (4f) and 9d (6g) sites for R3m (P63/mmc) structure.
Fe atoms partly replace R atoms
on 6c-R (2b) sites for R3m (P63/mmc) structure forming 12e (4e) dumbbells.