摘要
在水热条件下,利用Na2EDTA为模板导向剂,合成了Eu掺杂的YVO4纳米棒,通过XRD、SEM、TEM、HRTEM和超导量子磁强计对产物的结构和磁学性能进行了表征和测试。结果表明,产物为纯净的四方锆石型结构的YVO4∶Eu纳米棒,其长度为0.5～1μm,直径为30～100nm。模板剂和生长溶液的pH值决定着YVO4∶Eu纳米晶体的结构与形貌。在低温下,YVO4纳米晶体表现出明显的反铁磁性。与纯净的YVO4纳米棒相比,Eu掺杂的YVO4纳米棒的磁化系数明显增大,磁性能显著改善。
Single-crystalline YVO,：Eu nanorods were synthesized successfully by a Na2EDTA-mediated hydrothermal method. The resulting products were characterized using XRD, SEM, TEM, HRTEM and SQUID magnetometer. The results indicated that YVO4：Eu nanorods were in a rod-like shape with length in the range of 0.5-1μm and diameter in the range of 30-100 nm. It was found the template and the pH value of the precursor solution play an important role in determining the morphologies and growth process of YVO4：Eu products. Furthermore, the magnetism of YVO4：Eu products were characterized. YVO, nanocrystals exhibit the noticeable antiferromagnetism at low temperature. And this strong 1D anisotropy and the Eu^3＋ ions doping improved the magnetic performances remarkably.
出处
《陶瓷学报》
CAS
2007年第2期79-83,共5页
Journal of Ceramics
基金
国家自然科学基金项目资助(编号:50672071
50672072)
