  We report results of studying the magnetization, specific heat and thermal
expansion of a single crystal with nominal composition Mn 0.85 Fe 0.15 Si . We
found no thermodynamic evidences in favor a second order phase transition in
the 15 % Fe substituted MnSi. The trajectory corresponding to the present
composition of (MnFe)Si is a critical one, i.e. approaching quantum critical
point at lowering temperature, but some properties may feel the cloud of
helical fluctuations bordering the phase transition line.
