稀磁半导体Cr掺杂CdS纳米结构及磁性能研究  

Study on diluted magnetic semiconductor Cr-doped CdS nanostructures and magnetic properties

作　　者：张珠峰 任银拴[2] ZHANG Zhufeng;REN Yinshuan(Chong Qing College of Mobile Communication,Chongqing 401520,China;School of Physics and Electronics,Qian Nan Normal University for Nationalities,Duyun 558000,China)

机构地区：[1]重庆移通学院,重庆401520 [2]黔南民族师范学院物理与电子学院,贵州都匀558000

出　　处：《无机盐工业》2025年第3期50-57,共8页Inorganic Chemicals Industry

基　　金：国家自然科学基金项目(11864032);贵州省基础研究计划项目(自然科学类)([2020]1Y208);庆移通学院高等教育教学改革研究项目(22JG322)。

摘　　要：针对稀磁半导体纳米材料在电子元器件、半导体芯片、集成电路有广泛的应用,基于溶剂热法,在180℃下,以CdO、S粉和六水合氯化铬(CrCl_(3)·6H_(2)O)为原料,乙醇胺、乙二胺为有机溶剂,用溶剂热法合成具有室温铁磁性Cr掺杂CdS纳米结构的稀磁半导体。采用X射线衍射(XRD)、透射电子显微镜(TEM)、电子能量散射谱(EDS)、紫外-可见吸收光谱(UV-Vis)、超导磁体振动样品磁强计(VSM)检测产物的晶体结构、形貌、光学性质及磁学性能。结果表明,Cr掺杂的CdS纳米结构具有纤锌矿结构,Cd_(1-x)Cr_(x)S(x=3.94%)纳米颗粒具有规则形貌,颗粒直径为30~40 nm。合成产物由Cr、Cd和S 3种元素构成,Cr掺杂CdS纳米颗粒物质的量分数最高达到7.16%。在室温下,Cr掺杂CdS产生强铁磁性能,然而未掺杂的CdS则产生出较弱铁磁性能,Cd_(1-x)Cr_(x)S(x=3.94%)纳米颗粒饱和磁化强度M_(s)为9.258×10^(-6)A·m^(2)/g,H_(c)矫顽力为73.25 Oe(1 Oe=103/4πA/m)。Cr掺杂CdS铁磁性增强与CdS晶格中Cr掺杂产生结构缺陷有关,Cr掺杂CdS铁磁性的起源归因于双交换机制。In response to the widespread application of dilute magnetic semiconductor nanomaterials in electronic components,semiconductor chips,integrated circuits,and other fields,based on solvent thermal method,a dilute magnetic semiconductor with room temperature ferromagnetic Cr-doped CdS nanostructures was synthesized by solvothermal method using CdO,S powder,hexahydrate chromium chloride(CrCl_(3)·6H_(2)O)as raw materials,ethanolamine,and ethylenediamine as organic solvents at 180℃.The crystal structure,morphology,optical properties,and magnetic properties of the samples were detected using X-ray diffraction(XRD),transmission electron microscopy(TEM),electron energy scattering spectroscopy(EDS),ultraviolet visible absorption spectroscopy(UV-Vis),and superconducting magnet vibration sample magnetometer(VSM).The results indicated that Cr-doped CdS nanostructures had a wurtzite structure,and the average particle size of Cd_(1-x)Cr_(x)S(x=3.94%)nanoparticles with regular morphology in the range of 30~40 nm.The synthetic product,composed of Cr,Cd,and S,was observed,the highest content of Cr-doped CdS nanoparticles was 7.16%(Cr atomic).At room temperature,Cr-doped CdS produced enhanced ferromagnetism,while undoped CdS produced weak ferromagnetism.The saturation magnetization M_(s) of the Cd_(1-x)Cr_(x)S(x=3.94%)nanoparticles was 9.258×10^(-6)A·m^(2)/g,and the coercivity of H_(c) was 73.25 Oe(1 Oe=103/4πA/m).The ferromagnetic origin of Cr-doped CdS was related to the structural defects generated by Cr doping in the CdS lattice.The ferromagnetic origin of Cr-doped CdS was related to the structural defects generated by Cr doping in the CdS lattice,the origin of Cr-doped CdS ferromagnetism was attributed to the double exchange mechanism.

关 键 词：Cr掺杂CdS 纳米结构 铁磁性 溶剂热 

分 类 号：TQ136.1[化学工程—无机化工]