  Influence of doping by iron impurity on spin-Peierls state in CuGeO3 is
studied. ESR measurements for the frequency/temperature domain 60-450 GHz/
1.8-300 K and specific heat data obtained for the interval 6-20 K show that
insertion of 1% of Fe completely destroy both spin-Peierls and
antiferromagnetic orders. Damping of long-range magnetic order is accompanied
by onset at T<20 K of power asymptotics for magnetic susceptibility
chi~T^-alpha and magnetic part of specific heat cm~T^(1-alpha), with the index
alpha=0.35-0.37. This effect is characteristic to the limit of strong disorder
for doped CuGeO3 and may reflect formation of the Griffiths phase at low
temperatures in CuGeO3:Fe.
