Cu或Sn与Fe共掺杂对ZnO晶体形貌和磁性的影响

Effects of Cu or Sn and Fe Co-Doping on the Morphology and Magnetism of ZnO Crystals

采用水热法,在前驱物Zn(OH)2中添加一定量的分析纯FeSO4·7H2O和CuCl2·2H2O或SnCl2·2H2O,以3 mol/L KOH溶液作为矿化剂,填充度为35%,反应温度430℃,经24 h反应合成ZnO晶体。掺杂Fe的ZnO晶体室温下测量无磁饱和现象和磁滞回线,不具备室温铁磁性。Cu与Fe共掺杂合成ZnO晶体,随温度的升高其比磁化强度下降的幅度减小,室温下测量具有磁饱和现象和磁滞回线。Sn与Fe共掺杂的晶体形貌最好,且比磁化强度较大,没有随温度升高而下降,存在室温铁磁性和顺磁性。Cu或Sn元素的加入增加了掺杂Fe的ZnO晶体的磁性,改善了晶体形貌。

Through adding a certain amount of analytical pure FeSO4·7H2O and CuCl2·2H2O or SnCl2·2H2O in the precursors Zn（OH）2,the ZnO crystals were synthesized by hydrothermal method with 3 mol/L KOH as a mineralizer,the degree of filling of 35%,reaction temperature of 430 ℃ and reaction time of 24 h.The measuring results show that the Fe doped ZnO crystals have no magnetic saturation phenomenon and hysteresis loop at room temperature,and thus have no room temperature ferromagnetism.For Cu-Fe co-doped ZnO crystals,the drop of the magnetic moment decreases with the rise of temperature,the measuring results show that the Cu-Fe co-doped ZnO crystals have magnetic saturation phenomenon and hysteresis loop at room temperature.The morphology of Fe-Sn co-doped ZnO crystals is the best.The magnetic moment of Fe-Sn co-doped ZnO crystals is bigger,and does not fall with the rise of temperature.Fe-Sn codoped ZnO crystals have room temperature ferromagnetism and paramagnetic.By adding Cu or Sn,the magnetism and crystal morphology of Fe doped ZnO crystals are improved.