  The specific heat, magnetization and thermal expansion of single crystals of
antiferromagnetic insulator EuTe, measured at temperatures down to 2 K and in
magnetic fields up to 90 kOe, demonstrate non trivial properties. The Neel
temperature, being 9.8 K at H=0, decreases with magnetic field and tends to
zero at 76 kOe, therefore forming a quantum critical point. The heat capacity
and thermal expansion coefficient reveal lambda-type anomalies at the second
order magnetic phase transition at low magnetic fields, evolving to simple
jumps at high magnetic fields and low temperatures, well described in a
fluctuation free mean-field theory. The experimental data and the corresponding
analysis favor the quantum concept of effective increasing space dimensionality
at low temperatures that suppresses a fluctuation divergence at a second order
phase transition.
