| 尖晶石结构自旋有序CaTi2O4单晶生长和磁化率特性研究 |
| |
| 引用本文： | 刘雍,周睿,李靖,张悦,熊锐,尹镝,汤五丰,石兢. 尖晶石结构自旋有序CaTi2O4单晶生长和磁化率特性研究[J]. 物理学报, 2010, 59(8): 5620-5625 |
| |
| 作者姓名： | 刘雍 周睿 李靖 张悦 熊锐 尹镝 汤五丰 石兢 |
| |
| 作者单位： | 武汉大学物理系,教育部声光材料与器件重点实验室,武汉 430072 |
| |
| 基金项目： | 国家自然科学基金(批准号:10974148,10674105),国家基础科学人才培养基金(批准号:J0830310)资助的课题. |
| |
| 摘 要： | 通过助溶剂熔融法并在氩气气氛炉中成功生长出高质量大尺寸的CaTi2O4的单晶.X射线衍射实验及能量损失谱EDS证实,制备的CaTi2O4单晶晶胞参数a=9.781?,b=9.966?,c=3.148?,所有样品均为单相,且符合化学计量比,样品高纯.通过直流磁化率的测量,首次给出了晶体的Van-Vleck顺磁因子为6.85×10-5cm3/mol,Cure-Weiss温度为-0.44 K,呈弱反铁磁性.同时,通过单晶各向磁化率的测量,进一步确认了CaTi2O4晶体中一维有序Ti-Ti反铁磁dimer链的形成,并明确了其方向.关键词：2O4')" href="#">CaTi2O4磁化率各向异性反铁磁二聚化
|
| 关 键 词： | CaTi2O4 磁化率 各向异性 反铁磁二聚化 |
| 收稿时间： | 2009-09-15 |
Single crystal growth and magnetic properties of spinel structure and spin ordering compound CaTi2O4 |
| |
| Liu Yong,Zhou Rui,Li Jing,Zhang Yue,Xiong Rui,Yin Di,Tang Wu-Feng,Shi Jing. Single crystal growth and magnetic properties of spinel structure and spin ordering compound CaTi2O4[J]. Acta Physica Sinica, 2010, 59(8): 5620-5625 |
| |
| Authors: | Liu Yong Zhou Rui Li Jing Zhang Yue Xiong Rui Yin Di Tang Wu-Feng Shi Jing |
| |
| Affiliation: | Key Laboratory of Acoustic and Photonic Material and Device of Ministry of Education, Department of Physics,Wuhan University, Wuhan 430072, China;Key Laboratory of Acoustic and Photonic Material and Device of Ministry of Education, Department of Physics,Wuhan University, Wuhan 430072, China;Key Laboratory of Acoustic and Photonic Material and Device of Ministry of Education, Department of Physics,Wuhan University, Wuhan 430072, China;Key Laboratory of Acoustic and Photonic Material and Device of Ministry of Education, Department of Physics,Wuhan University, Wuhan 430072, China;Key Laboratory of Acoustic and Photonic Material and Device of Ministry of Education, Department of Physics,Wuhan University, Wuhan 430072, China;Key Laboratory of Acoustic and Photonic Material and Device of Ministry of Education, Department of Physics,Wuhan University, Wuhan 430072, China;Key Laboratory of Acoustic and Photonic Material and Device of Ministry of Education, Department of Physics,Wuhan University, Wuhan 430072, China;Key Laboratory of Acoustic and Photonic Material and Device of Ministry of Education, Department of Physics,Wuhan University, Wuhan 430072, China |
| |
| Abstract: | High quality and large-size single crystals of CaTi2O4 were prepared by the molten salt flux method. The X-ray diffraction and the EDS results showed that all the CaTi2O4 crystals have the rom temperature lattice parameters a=9.781 ?,b=9.966 ? and c=3.148 ?, and all the samples have perfect stoichiometric composition. Through the magnetic susceptibility measurement, we first obtained the Van-Vleck paramagnetic parameter of CaTi2O4 of 6.85×10－5cm3/mol, and Cure-Weiss temperature of -0.44 K, revealing that CaTi2O4 is a weak ferromagnetic compound. Further more, the existence of Ti-Ti dimer was confirmed by anisotropy measurement, the structure and direction of the antiferromagnetic dimer chains were also determined.
Keywords：2O4')" href="#">CaTi2O4magnetic susceptibilityanisotropyantiferromagnetic dimer |
| |
| Keywords: | CaTi2O4 magnetic susceptibility anisotropy antiferromagnetic dimer |
| 本文献已被 万方数据 等数据库收录！ |
| 点击此处可从《物理学报》浏览原始摘要信息 |
|
点击此处可从《物理学报》下载免费的PDF全文 |
|
