High Temperature Metal-Insulator Transition Induced by Rare-Earth Doping in Perovskite CaMnO3
文献类型：期刊论文
| 作者 | Wang, Yang; Sui, Yu1; Cheng, Jinguang; Wang, Xianjie; Lu, Zhe; Su, Wenhui |
| 刊名 | JOURNAL OF PHYSICAL CHEMISTRY C
 |
| 出版日期 | 2009-07-16 |
| 卷号 | 113期号:28页码:12509-12516 |
| ISSN号 | 1932-7447 |
| DOI | 10.1021/jp809049s |
| 通讯作者 | Sui, Yu(suiyu@hit.edu.cn) |
| 英文摘要 | This paper reports the crystal structure and high-temperature transport properties of electron-doped perovskite manganites Ca0.9R0.1MnO3 (R = La, Pr,..., Yb). All the samples crystallized into a orthorhombic distorted perovskite structure (space group Prima). The structural distortion increases as the average A-site cation size < r(A)> decreases; the average Mn-O-Mn bond angle theta(Mn-O-Mn) monotonously decreases, while the average Mn-O bond length d(Mn-O) exhibits a minimum at R = Dy. The Substitution of R3+ for Ca2+ markedly enhances the electrical conductivity of parent CaMnO3 and induces a metal-insulator transition at T-MI which varies from 325 K to 420 K with R3+. Among all the samples, Ca0.9Dy0.1MnO3 shows the lowest resistivity and T-MI, mainly because of its shortest d(Mn-O) and largest effective bandwidth W. Thermally activated conductivity is, valid below T-MI, and the activation energy increases slightly with the structural distortion. All of the samples exhibit metallic-like behavior above T-MI. The measurements of magnetic susceptibility and the Seebeck coefficient indicate that the metal-insulator transition with R3+ doping is induced by the spin-state transition of Mn3+ ions, and the transition is strongly influenced by the crystal structure. Moreover, the observed T-MI can be well described as a function of the structural parameters theta(Mn-O-Mn) and the A-site cation size variance sigma(2). |
| 资助项目 | National Natural Science Foundation of China[50672019] |
| WOS研究方向 | Chemistry ; Science & Technology - Other Topics ; Materials Science |
| 语种 | 英语 |
| WOS记录号 | WOS:000268139500073 |
| 出版者 | AMER CHEMICAL SOC |
| 资助机构 | National Natural Science Foundation of China |
| 源URL | [http://ir.imr.ac.cn/handle/321006/97698]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Sui, Yu |
| 作者单位 | 1.Harbin Inst Technol, Dept Phys, CCMST, Harbin 150001, Peoples R China 2.Acad Sinica, Int Ctr Mat Phys, Shenyang 110015, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Yang,Sui, Yu,Cheng, Jinguang,et al. High Temperature Metal-Insulator Transition Induced by Rare-Earth Doping in Perovskite CaMnO3[J]. JOURNAL OF PHYSICAL CHEMISTRY C,2009,113(28):12509-12516. |
| APA | Wang, Yang,Sui, Yu,Cheng, Jinguang,Wang, Xianjie,Lu, Zhe,&Su, Wenhui.(2009).High Temperature Metal-Insulator Transition Induced by Rare-Earth Doping in Perovskite CaMnO3.JOURNAL OF PHYSICAL CHEMISTRY C,113(28),12509-12516. |
| MLA | Wang, Yang,et al."High Temperature Metal-Insulator Transition Induced by Rare-Earth Doping in Perovskite CaMnO3".JOURNAL OF PHYSICAL CHEMISTRY C 113.28(2009):12509-12516. |
入库方式： OAI收割
来源：金属研究所
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