Facile chemical precipitation method was used to synthesize Ni (4%) doped and Co (4%): Ni (4%) co-doped CdS nanoparticles. Polyvinylpyrrolidone (PVP) was used as a surfactant to control the particles size and growth rate. The synthesized co-doped sample showed mixed structures of cubic and hexagonal which was confirmed by X-ray diffraction (XRD) study. Average crystallite size is to be 4.2 nm and 3.3 nm for Ni doped and Co:Ni co-doped CdS nanoparticles, respectively. Transmission electron microscopy (TEM) results showed spherical shape with homogeneous particle size distribution of the samples. Due to reduction the particle size, the absorption peak of co-doped CdS shows a significant blue shifting compared to the single metal ion doped CdS nanoparticles. Electron paramagnetic resonance (EPR) spectroscopy was used to study the magnetic g-factor, covalency parameter and magnetic properties of the samples. Anti-ferromagnetic magnetic signal was observed for doped and co-doped samples using Vibrating Sample Magnetometer (VSM) at room temperature. Thermal stability and lattice deformation of the samples were studied using Thermo Gravimetric–Differential Thermal Analysis (TG–DTA). The obtained room temperature based magnetic properties of CdS:Co:Ni nanoparticles demonstrate it could be suitable for spintronic and optoelectronic applications.

采用简便的化学沉淀法合成了掺Ni（4％）和Co（4％）：Ni（4％）共掺杂的CdS纳米粒子。聚乙烯吡咯烷酮（PVP）用作表面活性剂以控制颗粒尺寸和生长速率。合成的共掺杂样品显示出立方和六边形的混合结构，这通过X射线衍射（XRD）研究得以证实。掺镍和掺钴Co：Ni的CdS纳米粒子的平均微晶尺寸分别为4.2 nm和3.3 nm。透射电子显微镜（TEM）结果显示出球形，样品的粒度分布均匀。由于减小了粒径，与单金属离子掺杂的CdS纳米颗粒相比，共掺杂的CdS的吸收峰显示出明显的蓝移。电子顺磁共振（EPR）光谱用于研究磁场g因子，共价参数和样品的磁性能。在室温下使用振动样品磁强计（VSM）观察到掺杂和共掺杂样品的反铁磁信号。样品的热稳定性和晶格变形使用热重差热分析（​​TG-DTA）进行了研究。获得的基于室温的CdS：Co：Ni纳米粒子的磁性能证明它可能适用于自旋电子学和光电应用。