六方YMnO_3纳米棒的制备、微结构及磁性研究  

Investigation of preparation,microstructure and magnetic property of hexagonal YMnO_3 nanorods

作　　者：刘越峰[1,2] 郑海务[1] 张伟风[1] 顾玉宗[1] 李银丽[1] 张华荣[1] 

机构地区：[1]河南大学物理系,微系统物理研究所,河南省光伏材料重点实验室,河南开封475004 [2]河南大学基础实验教学中心,河南开封475004

出　　处：《功能材料》2010年第8期1336-1339,共4页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(50802023);河南省科技攻关重点资助项目(082102270039);河南省高等学校青年骨干教师计划资助项目(2009GGJS-026);河南省教育厅自然科学研究计划资助项目(2008B140003;2009A430002);河南大学科研基金资助项目(07YBGG008)

摘　　要：采用水热法成功合成了YMnO3纳米棒,利用XRD、SEM、EDS、HRTEM和SAED对产物进行了表征。实验结果表明,产物为六方纯相YMnO3纳米棒,高分辨电镜图片显示晶面间距为0.298nm,对应(004)面间距,结合XRD及选区电子衍射结果,可以得出纳米棒沿[001]方向生长,并初步分析了纳米棒的形成机理。测试了YMnO3纳米棒的M-T曲线,观察到了由表面未补偿自旋引起的自旋玻璃态。YMnO3 nanorods have been hydrothermally synthesized and characterized by X-ray diffraction,high resolution transmission electron microscopy and selected area electron diffraction methods. X-ray diffraction results indicate YMnO3 nanorods are of pure hexagonal phase. The HRTEM images display that the YMnO3 nanorods with high crystallinity have an interplanar spacing of 0.298nm corresponding to the （004） interplanar spacing. The results of the XRD and SAED suggest the YMnO3 nanorods have grown along [001] direction. A possible formation mechanism is deduced and discussed. Temperature dependent magnetization curve reveals that uncompensated spin of the surfaces results in a spin glass feature.

关 键 词：YMnO3 纳米棒 水热法 微结构 磁性 

分 类 号：O614.32[理学—无机化学] O469[理学—化学]