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  • 1985-1989  (2)
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  • 1
    Electronic Resource
    Electronic Resource
    Mössbauer relaxation spectra of LiNbO3: Fe(III) (1988)
    Springer
    Hyperfine interactions 42 (1988), S. 1067-1070 
    Details
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Mössbauer spectra of LiNbO3: Fe(III)-monocrystals were measured in zero external magnetic field (5mK to 673K). They all show typical lineshapes due to relaxation effects. Below 77K temperature independent and above 77K a temperature-dependent relaxation is observable. In spectra measured in external magnetic fields relaxation effects occur only above 77K. We present least square fits of spectra measured at 300K and external magnetic fields using symmetry invariant reservoir spectral densities. The applied numerical formalism takes the complete electronuclear manifold of57Fe(III) into account. We discuss the problems concerning the interpretation of zero field spectra.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02395575
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Electronic structure and spin relaxation of Fe(III) in LiNbO3 (1986)
    Springer
    Hyperfine interactions 28 (1986), S. 785-788 
    Details
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Crystal field parameter have been determined from EPR spectra (77K) of LiNbO3∶Fe(III). Anomalous line shapes are described phenomenologically and saturation studies are compared with calculations using a second order dynamic spin-hamiltonian H′. Mössbauer spectra of LiNbO3∶Fe(III) have been interpreted by means of simulations using Liouville superoperators including a static fine-and a hyperfine spin-hamiltonian and H′. Calculations have been performed using an effective spin of 1/2, the supermatrix with dimension 288 and a reduced formalism (supermatrix with dimension 96).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02061563
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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