Epitaxial growth and magnetic and electric properties of Co-doped TiO2 thin films - Is nonequilibrium doping an essential for ferromagnetism? | |
Li, J ; Sow, OH ; Rao, SX ; Ong, CK ; Zheng, DN | |
刊名 | EUROPEAN PHYSICAL JOURNAL B
![]() |
2003 | |
卷号 | 32期号:4页码:471 |
关键词 | MOLECULAR-BEAM EPITAXY TITANIUM-DIOXIDE ANATASE TIO2 ROOM-TEMPERATURE SEMICONDUCTORS TIO2(001) SURFACE |
ISSN号 | 1434-6028 |
通讯作者 | Li, J: Chinese Acad Sci, Inst Phys, POB 603, Beijing 100080, Peoples R China. |
中文摘要 | In this research, c-axis oriented epitaxial anatase TiO2 thin films were grown on SrTiO3(100) substrates using a ceramic Ti0.95Co0.05O2 target by Pulsed Laser Deposition (PLD). The film growth processes were monitored by reflective high energy electronic diffraction (RHEED). Microstructure, conductivity, and magnetism of these doped films are found strongly affected by the oxygen pressure and substrate temperature T-s. Grown at a T-s around 750 degreesC in an oxygen pressure of 0.2 mbar, the dopants are found existing as oxide inclusions. The doped film thus behaves as an insulator and shows diamagnetism in a magnetic field parallel to the film surface. However, in the doped film grown at a reduced temperature of 630 degreesC in a vacuum, no impurity phase. can be identified. The film shows a saturated magnetic moment of 0.16mu(B)/Co and a fairly good conductivity at room temperature. It is then concluded that nonequilibrium growth at lower temperatures in vacuum is essential for a high solubility of Co in the TiO2 lattice and thus the ferromagnetism. |
收录类别 | SCI |
语种 | 英语 |
公开日期 | 2013-09-17 |
内容类型 | 期刊论文 |
源URL | [http://ir.iphy.ac.cn/handle/311004/37489] ![]() |
专题 | 物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文 |
推荐引用方式 GB/T 7714 | Li, J,Sow, OH,Rao, SX,et al. Epitaxial growth and magnetic and electric properties of Co-doped TiO2 thin films - Is nonequilibrium doping an essential for ferromagnetism?[J]. EUROPEAN PHYSICAL JOURNAL B,2003,32(4):471. |
APA | Li, J,Sow, OH,Rao, SX,Ong, CK,&Zheng, DN.(2003).Epitaxial growth and magnetic and electric properties of Co-doped TiO2 thin films - Is nonequilibrium doping an essential for ferromagnetism?.EUROPEAN PHYSICAL JOURNAL B,32(4),471. |
MLA | Li, J,et al."Epitaxial growth and magnetic and electric properties of Co-doped TiO2 thin films - Is nonequilibrium doping an essential for ferromagnetism?".EUROPEAN PHYSICAL JOURNAL B 32.4(2003):471. |
个性服务 |
查看访问统计 |
相关权益政策 |
暂无数据 |
收藏/分享 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论