  Magnetic phases for the intermetallic compound NdMn1.4Co0.6Si2 have been
investigated at various temperatures by dc magnetization, neutron diffraction
and neutron depolarization. Our study shows multiple magnetic phase transitions
with temperature (T) over 1.5-300 K. In agreement with dc-magnetization and
neutron depolarization results, the temperature dependence of the neutron
diffraction patterns shows five distinct regions with different magnetic
phases. These temperature regions are (i) T >= 215 K, (ii) 215 K > T >= 50 K,
(iii) 50 K > T >= 40 K, (iv) 40 K > T > 15 K, and (v) T =< 15 K. The
corresponding magnetic structures are paramagnetic, commensurate collinear
antiferromagnetic (AFM-I), incommensurate AFM (AFM-II), mixed ferromagnetic and
AFM (FM+AFM-II), and incommensurate AFM (AFM-II), respectively.
