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Out‐of‐equilibrium nanocrystalline R ~1– s ~(Fe, M )~5+2 s ~ alloys ( R = Sm, Pr; M = Co, Si, Ga) by L. Bessais; C. Djéga‐Mariadassou is a Physics and Astronomy article available to read on EtoBox.

What is Out‐of‐equilibrium nanocrystalline R ~1– s ~(Fe, M )~5+2 s ~ alloys ( R = Sm, Pr; M = Co, Si, Ga) about?

## Abstract The out‐of‐equilibrium hexagonal __P__6/__mmm__ __R__~1–__s__~(Fe, __M__)~5+2__s__~ (__R__ = Sm, Pr and __M__ = Co, Si or Ga) intermetallics are obtained by controlled nanocrystallization. A model is presented to explain the structure of the hexagonal phases, which stoichiometry is consistent with Sm(Fe, M)~9~ and __R__(Fe, Ti, Co)~10~. The Curie temperatures increase versus Ga, Si, Co content. The analysis of the Mössbauer spectra leads to monotonous variation of the hyperfine parameters. The refinement of the Mössbauer spectra was performed on the basis of the correlation between Wigner–Seitz cell volumes obtained from X‐ray diffraction results and isomer shifts. The abundance of each magnetic site was calculated by the multinomial distribution law. For a given substituting Co, Si, Ga content, the sequence for the isomer shift in the hexagonal cell is 2__e__ > 3__g__ > 6__l__. With increasing __M__ content, the isomer shift of the 3__g__ site remains quasi‐constant. Those approaches lead to the location of Si, Ga, Co in 3__g__ site, Ti in 6__l__ site. (© 2005 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

Who reads Out‐of‐equilibrium nanocrystalline R ~1– s ~(Fe, M )~5+2 s ~ alloys ( R = Sm, Pr; M = Co, Si, Ga)?

Author

L. Bessais; C. Djéga‐Mariadassou

Publisher

John Wiley and Sons; Wiley (John Wiley & Sons); John Wiley & Sons Ltd.; Wiley (ISSN 0370-1972)

Published

2005

Language

EN

Field

Physics and Astronomy (Physical Sciences)