Room temperature ferromagnetism and diamagnetism of Co-doped ZnO microspheres synthesized by sol–gel method
Room temperature ferromagnetism and diamagnetism of Co-doped ZnO microspheres synthesized by sol–gel method
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DOI：
10.1016/j.matlet.2014.02.062
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发表时间：
2014-05
影响因子：
3
通讯作者：
Xiaohong Yu;Changzhen Liu;D. Meng;Can Lu;Jie Liu;Huixia Li;Yongqian Wang;Junxia Wang
中科院分区：
文献类型：
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作者：
Xiaohong Yu;Changzhen Liu;D. Meng;Can Lu;Jie Liu;Huixia Li;Yongqian Wang;Junxia Wang
采用不研磨的两步溶胶-凝胶法制备了Zn1 - xCoxO （x=0%、1%、2%、3%和4%）微球，并分别用x射线衍射、扫描电镜和振动样品磁强计对其组成、形貌和磁性能进行了研究。x射线衍射结果表明，Co已成功掺杂到六方ZnO中。zn0.98 co0.020的扫描电镜图像显示，其平均粒径约为200 nm，比制备的ZnO纳米颗粒（60 nm）大。磁性能测试表明，共掺杂ZnO同时具有室温铁磁性和抗磁性。
We have prepared Zn1−xCoxO (x=0%, 1%, 2%, 3% and 4%) microspheres via a two-step sol–gel method without grinding and investigated their composition, morphology and magnetic properties by means of X-ray diffraction, scanning electron microscopy and vibrating sample magnetometer, respectively. The X-ray diffraction result demonstrates that Co has been successfully doped into hexagonal ZnO. The scanning electron microscope images of Zn0.98Co0.02O reveal an average particle size around 200 nm, which is larger than that of as-prepared ZnO nanoparticles (60 nm). Magnetic properties measurement indicates that room temperature ferromagnetism and diamagnetism were obtained in Co-doped ZnO at the same time.