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  • 11
    Electronic Resource
    Electronic Resource
    Magnetic behaviour and site occupation of YFe12-x V x (x=2,3,4) (1992)
    Springer
    Hyperfine interactions 68 (1992), S. 299-302 
    Details
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The effects of vanadium substitution on the iron magnetism in YFe12-x V x compounds (x∼2–4) have been studied by57Fe Mössbauer spectroscopy. The preference of vanadium atoms for the 8i site of these ThMn12-structure type compounds is confirmed. The rapid collapse of the iron sublattice magnetization with increasing vanadium concentration is analysed in terms of the ‘magnetic valence’ model.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02396495
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  • 12
    Electronic Resource
    Electronic Resource
    Investigation of Zr3Fe hydride phases (1988)
    Springer
    Hyperfine interactions 41 (1988), S. 543-546 
    Details
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Detailed Mössbauer studies of a series of hydrogenated Zr3Fe samples have demonstrated the existence of several hydride phases with hydrogen concentration up to Zr3FeH8. Despite the overall similarity of the spectra, assessment of their parameters has identified separate groupings, each linked with a particular phase. At low temperatures magnetic ordering is observed for Zr3FeH5.3 and Zr3FeH6.9.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02400448
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  • 13
    Electronic Resource
    Electronic Resource
    Magnetic behaviour ofCuAuFe alloys (1988)
    Springer
    Hyperfine interactions 40 (1988), S. 385-388 
    Details
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The magnetic properties of Cu99-xAuxFe1 alloys (x=12, 37 and 50.7 ats) have been investigated over the temperature range ∼4.2–70 K using low field AC magnetic susceptibility measurements and mössbauer spectroscopy. All alloys exhibit spin glass behaviour at low temperature with freezing temperatures Tf∼-5.7–7.6 K. Results of analysis of the high temperature (T≳3 Tf) Curie-Weiss behaviour are compared with those obtained from analysis of the broadly distributed 4.2 K Mössbauer spectra.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02049123
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  • 14
    Electronic Resource
    Electronic Resource
    Intermetallic phases of the Hf−Fe system (1988)
    Springer
    Hyperfine interactions 41 (1988), S. 547-550 
    Details
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract An assessment of the phases present in the Hf−Fe system agress well with the phase diagram and yields parameters in general agreement with previous Mössbauer studies. The Hf2Fe phase exhibits a quadrupole split spectrum whereas the HfFe2 compound shows magnetic hyperfine splitting.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02400449
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  • 15
    Electronic Resource
    Electronic Resource
    Segregation of iron inCuAuFe alloys (1988)
    Springer
    Hyperfine interactions 41 (1988), S. 571-574 
    Details
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract TheCuAuFe system has been studied by room temperature Mössbauer spectroscopy in order to examine the influence of varying both iron (Cu94−yAu6Fey; y=0.2–1.0 at%) and gold (Cu99−xAuxFe1; x=6–50.7 at%) concentrations on the clustering of iron atoms. Samples were examined in different metallurgical states, as rolled, fast quenched and melt spun with similar degrees of clustering being observed. The isomer shift is found to vary inversely with atomic volume for the Cu99−xAuxFe1 alloys.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02400455
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  • 16
    Electronic Resource
    Electronic Resource
    The activation energy for γ-Fe precipitates inCuFe (1990)
    Springer
    Hyperfine interactions 54 (1990), S. 811-816 
    Details
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The precipitation of the fcc γ-phase of iron has been studied by a systematic series of isothermal and isochronal (0–48 h) heat treatments (300–800°C) on a supersaturated solution ofCuFe containing 3 at% Fe. The optimal conditions (450–600°C) for precipitation of the maximum fraction (90%) of iron attainable within 48 h in the form of γ-Fe have been delineated from analysis of the room temperature spectra. The time dependence for formation of γ-Fe precipitates is well described by the equation for long term annealing. An activation energyE a ≈0.6 eV for the formation of γ-Fe in Cu is obtained. It indicates short range rather than long range diffusion in theCuFe sample studied.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02396133
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  • 17
    Electronic Resource
    Electronic Resource
    ESR measurements on hydrogenated Zr2Ni (1990)
    Springer
    Hyperfine interactions 60 (1990), S. 813-816 
    Details
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract X-band magnetic resonance measurements have been carried out on Zr2NiHx (x=0–5). The room temperature results indicate the presence of Ni atom clusters which form during the hydrogenation process. The intensity of the resonance signal depends on the hydrogenation treatment.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02399876
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  • 18
    Electronic Resource
    Electronic Resource
    Low temperature annealing of ball-milled Fe66B34 (1992)
    Springer
    Hyperfine interactions 69 (1992), S. 475-478 
    Details
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract High energy ball-milling of Fe and B powders of starting composition Fe66B34 resulted in an alloy which revealed both a nanostructural state and a disordered amorphous-like state and a majority of unreacted components. The disordered phase is located in the interfacial regions between the Fe and B atoms. The ball-milled sample was annealed at low temperatures (250–350°C) to examine further the proposition that solid-state reaction is the mechanism of amorphization by mechanical alloying. A slight reaction between the Fe and B grains which were previously unreacted, probably limited to their contacting boundaries, has been detected.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02401868
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  • 19
    Electronic Resource
    Electronic Resource
    Mössbauer effect study of57Fe-doped LaCo12B6 (1994)
    Springer
    Hyperfine interactions 94 (1994), S. 1903-1908 
    Details
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Mössbauer spectra of LaCo12B6 doped with57Fe have been obtained at various temperatures between 4.2 and 293 K. The observed splitting of the subspectrum associated with the 18h site belowT C indicates that the Co sublattice of LaCo2B6 remains ordered in the crystallographic basal plane, with no discernible change in magnetic ordering direction belowT C, contrary to the recent suggestion of a change in magnetic states based on NMR data.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02063715
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  • 20
    Electronic Resource
    Electronic Resource
    The ferromagnetic to antiferromagnetic transition in La1−x Y x Mn2Si2(57Fe) compounds (1994)
    Springer
    Hyperfine interactions 94 (1994), S. 1943-1949 
    Details
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A set of La1−xYxMn2Si2(57Fe) samples withx=0, 0.1, 0.15, 0.2, 0.25, 0.3, 0.5 and 1.0 have been prepared with the tetragonal ThCr2Si2 structure.57Fe Mössbauer spectra have been collected at 4.2 K for all samples. The spectra can be well fitted by two sextets, the predominant one (∼90% of the spectral area) being associated with57Fe atoms in the Mn 4d site, with the remainder located in the Si 4e site. The analysis shows that there are distinct changes in the hyperfine interaction parameters for samples above and below the critical concentrationx c ∼ 0.15, at which a transition from ferromagnetism to antiferromagnetism occurs. This transition is a result of a change in the exchange interactions linked with changes in the interatomic distances, due to the smaller atomic volume of Y compared to that of La.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02063721
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