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  • American Institute of Physics (AIP)  (3)
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  • 1
    Electronic Resource
    Electronic Resource
    Magnetic ordering in dimorphic phases of FeF3⋅3H2O: Magnetic and Mössbauer studies (1987)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 61 (1987), S. 4346-4348 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The two crystallographic modifications of ferric fluoride trihydrate (α- and β-FeF3⋅3H2O) were synthesized and studied by magnetic and Mössbauer techniques. The two forms could be distinguished by their different Mössbauer parameters. The magnetic susceptibility versus temperature curves also showed distinct differences. The susceptibility decreased monotonically with increasing temperature for the α form. For the β form, however, the susceptibility decreased initially and then went through a broad maximum around 130 K. The α form was found to convert to the β form after a year. The broad maximum in the susceptibility versus temperature curve observed for β-FeF3⋅3H2O is explained in terms of cooperative interaction involving relatively small number of Fe3+ ions. Postulates concerning the nature of the short-range antiferromagnetic ordering within "clusters'' of Fe3+ ions are presented.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.338443
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  • 2
    Electronic Resource
    Electronic Resource
    Metastable phases of cobalt-ironsilicide formed by sequential implantation of Co and Fe in Si (111) (2000)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 76 (2000), S. 1917-1919 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: By implanting Co and Fe in sequence into Si (111), metastable ternary Co1−xFexSi2 phases were formed. Mössbauer effect measurements showed three resonance line components in the spectrum. Comparison of the central shift (CS) values of the components with those appearing in the stable ternary phases indicated that iron atoms are positioned in the substitutional Co site, in the empty cube of the fluorite-type lattice and in CsCl-like B2 structures. It was found that the CS values of two components are in the velocity range of the values obtained for the metastable γ-FeSi2 synthesized using various methods. This result suggests the existence of a similar structure. © 2000 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.126211
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  • 3
    Electronic Resource
    Electronic Resource
    Phases of cobalt-iron ternary disilicides (1998)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 72 (1998), S. 2826-2828 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Cobalt–iron transition-metal disilicides were investigated by Mössbauer effect and x-ray diffraction in order to determine the concentration range of their homogeneous and separate phase formation. Except at low Co or Fe concentrations, Co and Fe formed separate CoSi2 and FeSi2 phases. Up to 10 at % Co was found soluble in β-FeSi2; Fe dissolved in CoSi2 below 1.5 at % and was positioned at two different sites of cubic symmetry. The results obtained for the phase formation in thin layers of epitaxial CoSi2 on Si implanted with Fe were in agreement with the results obtained for the bulk samples. © 1998 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.121470
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