Electronic structures and dielectric properties of BaCoxZn2-xFe16O27 from first principles
文献类型：期刊论文
| 作者 | Ri ChungHo3; Li Lin3; Qi Yang1 |
| 刊名 | ACTA PHYSICA SINICA
 |
| 出版日期 | 2012 |
| 卷号 | 61期号:20 |
| 关键词 | FERRITE BAZN2-XCOXFE16O27 COMPOSITES NEUTRON-DIFFRACTION MAGNETIC-PROPERTIES HEXAGONAL FERRITES W-type hexagonal ferrite first principles electronic structure dielectric properties |
| ISSN号 | 1000-3290 |
| 其他题名 | Electronic structures and dielectric properties of BaCo_xZn_(2-x)Fe_(16)O_(27) from first principles |
| 英文摘要 | On the basis of the crystal structure model of BaCoxZn2-xFe16O27, their ground electronic states and dielectric properties have been investigated using the generalized gradient approximation plus Hubbard U approach. The co-substitutions of cobalt and zinc cause the electrical conductivity of BaFe18O27 to change from a half-metallic to semiconductive. With the increase of Co content x, the energy gap of BaCoxZn2-xFe16O27 increases but the lattice constants and the magnetic moment of the unit cell decrease. The calculations of dielectric constants show that the static dielectric constants increase with x, lie in a range of 6.2-7.2 and appear to be anisotropic. Through the Born electric charge analysis it is shown that the polarization of Co and Zn itself has little effect on the polarization of the material and the main polarization may be related to the polarization of the iron and oxygen ions, caused by the crystal distortion. |
| 资助项目 | [National Basic Research Program of China] ; [National Natural Science Foundation of China] ; [Informalization Construction Project of Chinese Academy of Sciences] |
| 语种 | 英语 |
| CSCD记录号 | CSCD:4663402 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/153659]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 作者单位 | 1.中国科学院金属研究所 2.中国科学院植物研究所 3.东北大学 |
| 推荐引用方式 GB/T 7714 | Ri ChungHo,Li Lin,Qi Yang. Electronic structures and dielectric properties of BaCoxZn2-xFe16O27 from first principles[J]. ACTA PHYSICA SINICA,2012,61(20). |
| APA | Ri ChungHo,Li Lin,&Qi Yang.(2012).Electronic structures and dielectric properties of BaCoxZn2-xFe16O27 from first principles.ACTA PHYSICA SINICA,61(20). |
| MLA | Ri ChungHo,et al."Electronic structures and dielectric properties of BaCoxZn2-xFe16O27 from first principles".ACTA PHYSICA SINICA 61.20(2012). |
入库方式： OAI收割
来源：金属研究所
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