Infrared active phonon modes and ionicity of single crystal MgAl2O4
文献类型：期刊论文
| 作者 | Bi, CZ ; Ma, JY ; Yan, J ; Fang, X ; Zhao, BR ; Yao, DZ ; Qiu, XG |
| 刊名 | CHINESE PHYSICS
 |
| 出版日期 | 2006 |
| 卷号 | 15期号:5页码:1090 |
| 关键词 | LATTICE-VIBRATIONS OPTICAL-PROPERTIES SINTERED MGAL2O4 SPINEL SPECTRA TRANSITION PHASE FREQUENCIES ABSORPTION GROWTH |
| ISSN号 | 1009-1963 |
| 通讯作者 | Qiu, XG: Chinese Acad Sci, Inst Phys, Natl Lab Superconduct, POB 603, Beijing 100080, Peoples R China. |
| 中文摘要 | Near-normal incident infrared reflectivity spectra of (100) MgAl2O4 spinel single crystal have been measured at different temperatures in the frequency region between 50 and 6000 cm(-1). Eight infrared-active phonon modes are identified, which are fitted with the factorized form of the dielectric function. The dielectric property and optical conductivity of the MgAl2O4 crystal are analysed. From TO/LO splitting, the effective Szigeti charges and Born effective charges at different temperatures are calculated for studying the ionicity and the effect of polarization. Based on the relationship between the (LO-TO)(1) splitting, which represents the transverse and longitudinal frequencies splitting of the highest energy phonon band in the reflectivity spectrum, and the ionic-covalent parameter, the four main phonon modes are assigned. MgAl2O4 can be considered as a pure ionic crystal and its optical characters do not change with decreasing temperature, so it may be used as a suitable substrate for high-T-c superconducting thin films. |
| 收录类别 | SCI |
| 语种 | 英语 |
| 公开日期 | 2013-09-18 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/39947]  |
| 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 | Bi, CZ,Ma, JY,Yan, J,et al. Infrared active phonon modes and ionicity of single crystal MgAl2O4[J]. CHINESE PHYSICS,2006,15(5):1090. |
| APA | Bi, CZ.,Ma, JY.,Yan, J.,Fang, X.,Zhao, BR.,...&Qiu, XG.(2006).Infrared active phonon modes and ionicity of single crystal MgAl2O4.CHINESE PHYSICS,15(5),1090. |
| MLA | Bi, CZ,et al."Infrared active phonon modes and ionicity of single crystal MgAl2O4".CHINESE PHYSICS 15.5(2006):1090. |
入库方式： OAI收割
来源：物理研究所
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