Pressure-enhanced interplay between lattice, spin, and charge in the mixed perovskite La2FeMnO6
文献类型：期刊论文
| 作者 | Li, NN; Fan, FR; Sun, F; Wang, YG; Zhao, YS; Liu, FL; Zhang, Q; Ikuta, D; Xiao, YM; Chow, P |
| 刊名 | PHYSICAL REVIEW B
 |
| 出版日期 | 2019 |
| 卷号 | 99期号:19页码:— |
| 关键词 | X-RAY-ABSORPTION MAGNETIC-PROPERTIES CROSSOVER TRANSITION COMPLEXES MOSSBAUER IRON(II) STATE CONDUCTIVITY SPECTROSCOPY |
| ISSN号 | 2469-9950 |
| DOI | 10.1103/PhysRevB.99.195115 |
| 文献子类 | 期刊论文 |
| 英文摘要 | Spin crossover plays a central role in the structural instability, net magnetic moment modification, metallization, and even in superconductivity in corresponding materials. Most reports on the pressure-induced spin crossover with a large volume collapse have so far focused on compounds with a single transition metal. Here we report a comprehensive high-pressure investigation of a mixed Fe-Mn perovskite La2FeMnO6. Under pressure, the strong coupling between Fe andMn leads to a combined valence/spin transition: Fe3+(S = 5/2) -> Fe2+(S = 0) and Mn3+(S = 2) -> Mn4+(S = 3/2), with an isostructural phase transition. The spin transitions of both Fe and Mn are offset by similar to 20 GPa of the onset pressure, and the lattice collapse occurs in between. Interestingly, Fe3+ ion shows an abnormal behavior when it reaches a lower valence state (Fe2+) accompanied by a +0.5 eV energy shift in the Fe K-absorption edge at 15 GPa. This process is associated with the charge-spin-orbital state transition from high spin Fe3+ to low spin Fe2+, caused by the significantly enhanced t(2g)-e(g) crystal field splitting in the compressed lattice under high pressure. Density functional theory calculations confirm the energy preference of the high-pressure state with charge redistribution accompanied by spin state transition of Fe ions. Moreover, La2FeMnO6 maintains semiconductor behaviors even when the pressure reached 144.5 GPa as evidenced by the electrical transport measurements, despite the huge resistivity decreasing seven orders of magnitude compared with that at ambient pressure. The investigation carried out here demonstrates high flexibility of double perovskites and their good potentials for optimizing the functionality of these materials. |
| 语种 | 英语 |
| 源URL | [http://ir.sinap.ac.cn/handle/331007/31769]  |
| 专题 | 上海应用物理研究所_中科院上海应用物理研究所2011-2017年 |
| 作者单位 | 1.Ctr High Pressure Sci & Technol Adv Res HPSTAR, Shanghai 201203, Peoples R China; 2.Fudan Univ, State Key Lab Surface Phys, Lab Computat Phys Sci MOE, Shanghai 200433, Peoples R China; 3.Fudan Univ, Dept Phys, Shanghai 200433, Peoples R China; 4.Nanjing Univ, Collaborat Innovat Ctr Adv Microstruct, Nanjing 210093, Jiangsu, Peoples R China; 5.Fudan Univ, State Key Lab Surface Phys, Dept Phys, Shanghai 200433, Peoples R China; 6.Fudan Univ, Lab Adv Mat, Shanghai 200433, Peoples R China; 7.Argonne Natl Lab, HPCAT, Xray Sci Div, 9700 S Cass Ave, Argonne, IL 60439 USA; 8.Argonne Natl Lab, Xray Sci Div, Adv Photon Source, 9700 S Cass Ave, Argonne, IL 60439 USA; 9.Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai Synchrotron Radiat Facil, Shanghai 201204, Peoples R China; 10.Carnegie Inst Sci, Geophys Lab, Washington, DC 20001 USA; |
| 推荐引用方式 GB/T 7714 | Li, NN,Fan, FR,Sun, F,et al. Pressure-enhanced interplay between lattice, spin, and charge in the mixed perovskite La2FeMnO6[J]. PHYSICAL REVIEW B,2019,99(19):—. |
| APA | Li, NN.,Fan, FR.,Sun, F.,Wang, YG.,Zhao, YS.,...&Yang, WG.(2019).Pressure-enhanced interplay between lattice, spin, and charge in the mixed perovskite La2FeMnO6.PHYSICAL REVIEW B,99(19),—. |
| MLA | Li, NN,et al."Pressure-enhanced interplay between lattice, spin, and charge in the mixed perovskite La2FeMnO6".PHYSICAL REVIEW B 99.19(2019):—. |
入库方式： OAI收割
来源：上海应用物理研究所
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