Jpn. J. Appl. Phys. 26 (1987) Supplement 26-3-1 pp. 783-784  |Previous Article| |Next Article|  |Table of Contents|
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Proc. 18th Int. Conf. Low Temperature Physics, Kyoto, 1987

Experimental Investigation on Spontaneous Magnetic Fluctuations in a Spin Glass System

Ph. Riemann, E. Vincent, M. Ocio and J. Hammann

Measurements of the free thermodynamic magnetization fluctuations have been performed in the thiospinel compound CdIn_0.3Cr_1.7S₄, both above and below the glass temperature (T_g≃16.6 K), and in the frequency range 10^-2-10³Hz. From the fluctuation power spectrum, the out of phase susceptibility χ''(ω) is derived using the Fluctuation Dissipation Theorem. Systematic determinations of χ''(ω) around T_g enable us to analyse the critical behavior at the transition, on the basis of recent theories of dynamical scaling.

URL: http://jjap.jsap.jp/link?JJAPS/26S3/783/