Abd El-Moez等人对La_(0.7)Sr_(0.3)Mn_(1-x)Ni_xO_3(0.025≤x<0.125)化合物进行研究。X-射线衍射测定表明,当x≥0.75时,本化合物由R-3C菱形六面体转变为具有Ni~(2+)的Pb nm斜方晶结构。直流热磁测量表明,由于添加Ni~(2+),居里温度和磁化强度均呈降低趋势,磁热性能也受到影响,磁熵变化的极大值移向低温区。当x=0.025、0.075及0.125时,相对致冷功率分别为88J/kg、105J/kg及47J/kg。添加Ni~(2+)使塞贝 Abd El-Moez et al. Studied La 0.7 Sr 0.3 Mn 1-x Ni x O 3 (0.025 ≦ x <0.125). The results of X-ray diffraction show that when x≥0.75, the compound is transformed from R-3C diamond hexahedron to Pb nm rhombic structure with Ni 2+. DC thermomagnetic measurements show that due to the addition of Ni ~ (2+), the Curie temperature and magnetization show a decreasing trend, and the magnetocaloric performance is also affected. The maximum value of the magnetic entropy change moves to the low temperature region. The relative cooling power was 88 J / kg, 105 J / kg and 47 J / kg at x = 0.025, 0.075 and 0.125, respectively. Add Ni ~ (2 +) to make the shellfish