Magnetic and neutron diffraction study on Ni2In type (Mn1−xCox)65Sn35

Abstract The present paper describes the results of investigations of the crystal and magnetic properties of the Ni 2 In type (Mn 1− x Co x ) 65 Sn 35 compounds with X-ray and neutron diffraction (ND), as well as magnetometric methods. The (Mn 1− x Co x ) 65 Sn 35 crystallize in the Ni 2 In type in the range of 0⩽ x ⩽0.3. The ND study revealed that the Co atoms occupy only 2(d) site for x = 0.1 , 0.2 and both 2(a) site, 2(d) site for x = 0.25 , 0.3. The (Mn 1− x Co x ) 65 Sn 35 exhibits ferrimagnetism. In the lower temperature range, cluster glass like phase is observed. Especially in the range of x ⩽0.25, there exists a magnetic unit cell with two or three times the chemical one in the c direction.