Magnetic semiconductor compounds with general formula AB2X4 have attracted much attention of scientific community due to a number of new physical phenomena like multiferroicity [1] and colossal magnetoresistance [2] which present high interest both from the fundamental and applied point of view. A particular case represents the magnetic compond MnCr2S4 which crystallizes in the spinel structure with Fd-3m cubic symmetry. Using conventional solid state method of synthesis the polycrystalline (PC) samples of ternary MnCr2S4 were prepared. The single crystals (SC) of this compound were prepared by chemical transport reactions. The X-ray diffraction of the polycrystalline samples of MnCr2S4, performed by STАDI-P diffractometer, revealed nearly singlephase ternary compound, with an additional reflection of MnS minor phase of about 1.1%.  SQUID magnetometer was used to study the magnetic properties. In figure 1 the temperature dependence of the magnetic susceptibility χ(T) for PC (a) and SC (b) MnCr2S4 samples measured after cooling in magnetic field (FC) of 100 Oe and measured after cooling in zero magnetic field (ZFC) is presented. For both samples a strong step-like increase of the susceptibility below 65 K was observed. This behavior corresponds to a transition from the paramagnetic to ferrimagnetic ordered state. For the PC sample a splitting of the FCZFC susceptibility curves below TC was observed, the effect related to magnetic domain behavior. From these dependences, at low temperatures a second magnetic transition was revealed which arises at TYK=5 K. As it was previously reported for the PC samples [3] this behavior is attributed to the transition from the collinear Néel spin configuration to the triangular Yafet-Kittel type configuration. The slope of the χ(T) curve for temperatures T > 5 K, was suggested to be caused by the changes of the value of moments of the Mn2+ and Cr3+ ions with H in collinear structure, while the slope of the χ(T) curve for T ≤ TYK is caused by a change of the canting angle between two magnetic sublattices (Mn and Cr) by the external magnetic field [3].    Fig.1. Temperature dependence of the magnetic susceptibility χ(T) for MnCr2S4 polycrystalline (a) and single-crystalline (b) samples measured in field cooled (FC) and zero field cooled (ZFC  The Curie-Weiss temperature ΘCW = + 23.8 K for the PC sample and ΘCW = + 12 K for the SC sample were calculated. The positive sign indicate the dominance of the ferromagnetic interactions in this compound. From the magnetic field dependences of the magnetization M(H) for SC sample measured at low temperatures (2 K - 20 K) a linear increase of the net magnetization (from 1.29 µB to 2.00 µB per formula unit) with increasing temperature was obtained.