Abstract
Experiments on the field and frequency dependence of ac susceptibility (acs) for an amorphous Fe 80Mn 10Zr 10 alloy in the temperature range from 12 to 300 K are used to explore magnetic nature. There is a well-resolved frequency dependent maximum in the imaginary component of the acs at low temperature, which is the real significance of the reentrant spin-glass phase dynamics. The dynamic scaling analysis of the low field acs data indicates the presence of spin-glass transition T SG=40 K with a critical exponent Ψ=6.5 which seems to be a mixed state rather than a pure spin-glass state. The existence of mixed magnetic state could be understood based on exchange frustration model.
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