Substitutional effects in RFe3 intermetallics (R=Dy, Sm, Y)

Substitutional effects in RFe3 intermetallics (R=Dy, Sm, Y)

Samples of RFe3 (R=Dy, Sm, Y) were doped with Si, Al and Ti and studied by Mossbauer spectroscopy and X-ray diffraction. Most Mossbauer spectra were analyzed with three sextets, corresponding to the 6c, 3b and 18 h inequivalent lattice sites for iron. A quadrupole split doublet was also present in s...

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Veröffentlicht in:Intermetallics 2006-03, Vol.14 (3), p.332-335
Hauptverfasser: Sorescu, Monica, Diamandescu, L., Valeanu, M.
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Diamandescu, L.
Valeanu, M.
description Samples of RFe3 (R=Dy, Sm, Y) were doped with Si, Al and Ti and studied by Mossbauer spectroscopy and X-ray diffraction. Most Mossbauer spectra were analyzed with three sextets, corresponding to the 6c, 3b and 18 h inequivalent lattice sites for iron. A quadrupole split doublet was also present in some spectra, which became dominant for the case of Al substitution. The collapse of the hyperfine magnetic structure is a magnetic effect due to substitutions: the X-ray diffraction patterns yielded a particle size of about 100 nm, thus precluding the occurrence of superparamagnetism in these systems.
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title Substitutional effects in RFe3 intermetallics (R=Dy, Sm, Y)
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