Abstract
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.
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© 1983 Springer-Verlag
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Wenger, L.E. (1983). Relaxation effects in spin glasses around the freezing temperature. In: van Hemmen, J.L., Morgenstern, I. (eds) Heidelberg Colloquium on Spin Glasses. Lecture Notes in Physics, vol 192. Springer, Berlin, Heidelberg. https://doi.org/10.1007/3-540-12872-7_42
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DOI: https://doi.org/10.1007/3-540-12872-7_42
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