Relaxation effects in spin glasses around the freezing temperature

  • L. E. Wenger
Experimental Papers
Part of the Lecture Notes in Physics book series (LNP, volume 192)


Measurements of the ac magnetic susceptibility in zero field for several insulating spin-glasses are reported. By resolving the frequency dependence of both the in-phase component X′ and the out-of-phase component X″, the dynamical behavior of these spin systems around their freezing temperatures Tf can be clearly characterized. For two insulating systems: (EuSr)S and cobalt aluminosilicate, the susceptibility behavior can be described in terms of a wide distribution of relaxation times for temperatures well above Tf and whose width increases dramatically as the temperature nears T f. Furthermore by employing a simple phenomenological relaxation model, a quantitative picture of the relaxation time distribution can be ascertained as it evolves. From these pictures for the insulating as well as metallic spin-glass system, the dynamic behavior near Tf is qualitatively different than that of a long-range magnetically ordered solid.


Relaxation Time Freezing Temperature Spin Relaxation Time Relaxation Time Distribution Single Relaxation Time 
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Copyright information

© Springer-Verlag 1983

Authors and Affiliations

  • L. E. Wenger
    • 1
  1. 1.Department of PhysicsWayne State UniversityDetroitUSA

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