Study on the stability of charge-ordered state and rectifying properties of heteroepitaxial structure for manganites
文献类型：期刊论文
| 作者 | T. Qian ; T. F. Zhou ; X. G. Li |
| 刊名 | Journal of Electroceramics
 |
| 出版日期 | 2008 |
| 卷号 | 21期号:1-4页码:85-90 |
| 关键词 | Manganites Charge ordering Jahn-Teller distortion Heterojunction la1-xcaxmno3 transitions field |
| ISSN号 | 1385-3449 |
| 中文摘要 | We report the study on the stability of charge-ordered (CO) state and rectifying properties of heteroepitaxial structure for manganites R(1-x)Ca(x)MnO(3) (R = La, Pr, and Sm) by measuring magnetoresistance, magnetization, specific heat, 1-v characteristics, and X-ray diffraction. For the La(1-x)Ca(x)MnO(3) system, near the Ca(2+) concentration of x=0.75 the CO state is mostly stabilized and insensitive to external magnetic fields, which is supported by the charge transport, magnetic, and specific heat properties. By analyzing powder X-ray diffraction patterns, we found that the Jahn-Teller (JT) distortion in the CO state is the largest at x=0.75, which confirms the close relationship between the JT lattice distortion and the stability of the CO state for La(1-x)Ca(x)MnO(3). The stability of the CO state is also related to the A-site average ionic radius, < r(A)>. With decreasing the radius of the doped rare-earth elements (La, Pr, and Sm), the most stable CO state for the each doped system shifts gradually toward lower Ca(2+) concentration. In addition, we have fabricated simple p-n junctions using a heteroepitaxial structure of La(1-x)Ca(x)MnO(3)/Nb-doped SrTiO(3). These junctions show good rectifying properties for temperature from 85 to 305 K. The photovoltage as a function of light wavelength at room temperature has also been studied and the maximum photovoltage can reach 180 mV. The good rectifying behaviors and strong photovoltaic effect make these simple p-n junctions promising for applications. |
| 原文出处 | |
| 公开日期 | 2012-04-13 |
| 源URL | [http://210.72.142.130/handle/321006/33051]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 推荐引用方式 GB/T 7714 | T. Qian,T. F. Zhou,X. G. Li. Study on the stability of charge-ordered state and rectifying properties of heteroepitaxial structure for manganites[J]. Journal of Electroceramics,2008,21(1-4):85-90. |
| APA | T. Qian,T. F. Zhou,&X. G. Li.(2008).Study on the stability of charge-ordered state and rectifying properties of heteroepitaxial structure for manganites.Journal of Electroceramics,21(1-4),85-90. |
| MLA | T. Qian,et al."Study on the stability of charge-ordered state and rectifying properties of heteroepitaxial structure for manganites".Journal of Electroceramics 21.1-4(2008):85-90. |
入库方式： OAI收割
来源：金属研究所
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