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  • PACS. 75.40.Gb Dynamic properties (dynamic susceptibility, spin waves, spin diffusion, dynamic scaling, etc.) - 75.50.Lk Spin glasses and other random magnets  (2)
  • 1
    Electronic Resource
    Electronic Resource
    Magnetic relaxation phenomena in a CuMn spin glass (1999)
    Springer
    The European physical journal 10 (1999), S. 15-21 
    Details
    ISSN: 1434-6036
    Keywords: PACS. 75.40.Gb Dynamic properties (dynamic susceptibility, spin waves, spin diffusion, dynamic scaling, etc.) - 75.50.Lk Spin glasses and other random magnets
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract: Experiments on the temperature and time dependence of the response function and the field cooled magnetisation of a Cu(Mn) spin glass at temperatures below the zero field spin glass temperature are used to explore the non-equilibrium nature of the underlying spin configuration. The results imply that a certain spin configuration is imprinted on the system as the temperature is decreased at a constant cooling rate. The cooling rate governs the magnitude of the FC magnetisation ( (H,T)). Any intermittent halt at a constant temperature, , imprints an extended spin configuration, a process that is reflected e.g. in a downward relaxation of . On continued cooling at the same rate, the magnitude of (T) remains at a lower level than that of a continuous cooling curve. These results are put into the context of the corresponding behaviour of the response function as observed in measurements of the relaxation of the zero field cooled magnetisation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s100510050824
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  • 2
    Electronic Resource
    Electronic Resource
    Sensitivity to temperature perturbations of the ageing states in a re-entrant ferromagnet (1999)
    Springer
    The European physical journal 10 (1999), S. 23-28 
    Details
    ISSN: 1434-6036
    Keywords: PACS. 75.40.Gb Dynamic properties (dynamic susceptibility, spin waves, spin diffusion, dynamic scaling, etc.) - 75.50.Lk Spin glasses and other random magnets
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract: Dynamic magnetic properties and ageing phenomena of the re-entrant ferromagnet (Fe0.20Ni0.80)75P16B6Al3 are investigated by time dependent zero field cooled magnetic relaxation, m(t), measurements. The influence of a temperature cycling (perturbation), ,(prior the field application) on the relaxation rate is investigated both in the low temperature re-entrant spin glass “phase” and in the ferromagnetic phase. In the ferromagnetic phase the influence of a positive and a negative temperature cycle (of equal magnitude) on the response is almost the same (symmetric response). The result at lower temperatures, in the RSG “phase” is asymmetric, with a strongly affected response for positive, and hardly no influence on the response for negative temperature cycles. The behaviour at low temperatures is similar to what is observed in ordinary spin glasses.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s100510050825
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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