Magnetic properties and magnetocaloric effect of the Cr-based spinel sulfides Co1−xCuxCr2S4

Magnetic properties and magnetocaloric effect of the Cr-based spinel sulfides Co_1−xCu_xCr₂S₄

Zheng Xiao-Chao^{1, 2}, Li Xi-Yang², He Lun-Hua^{2, 3}, Zhang Shao-Ying^{2, 3}, Tang Ming-Hua^{4, ‡}, Wang Fang-Wei^{2, 3, †}

(color online) The refined lattice parameters and unit cell volume of Co_1−xCu_xCr₂S₄ (x = 0, 0.2, 0.4, 0.6, 0.8) as a function of Cu concentration x and the number of Cu atoms per unit cell N_Cu. Some data error bars are too small to be visible. The Cu substitution shrinks linearly the lattice constant at a ratio of 0.0223 Å per Cu atom substituted in the unit cell and the unit cell volume at a ratio of 6.4 Å³ per Cu atom substituted in the unit cell.