Abstract: The ferrimagnetic behavior of polycrystalline Nd1-xSrxCoO3 （0.1≤x≤0.5 ） sample is systematically investigated. The sample is prepared by using conventional solid state reaction method. The DC magnetization and the hysteresis loops of polycrystalline Nd1-xSrxCoO3 are carried out by using the physical properties measurement system of quantum design. DC magnetization studies show that magnetization increases in magnitude as a result of increasing size and number of ferromagnetic clusters, which shows ferromagnetic ordering. Moreover, DC magneti- zation studies show that polycrystalline samples form the formation of ferrimagnetic order at low temperature. The re- sult of the hysteresis loop suggests that magnetic coupling exists between Nd ions and Co ions. Therefore, Nd1-xSrxCoO3 ferrimagnetic order appears at low temperature due to the Co and Nd anti-parallel.

Key words: ferrimagnetic behavior, magnetic coupling, the phase separation, spin glass