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| Pressure-induced structural evaluation and insulator-metal transition in the mixed spinel ferrite Zn0.2Mg0.8Fe2O4 | |
| Rahman, S; Samanta, S; Errandonea, D; Yan, S; Yang, K; Lu, JL; Wang, L | |
| 2017 | |
| Source Publication | PHYSICAL REVIEW B
 |
| ISSN | 2469-9950 |
| Volume | 95Issue:2Pages:- |
| Subtype | 期刊论文 |
| Abstract | The effect of pressure on the electronic properties and crystal structure in amixed spinel ferrite Zn0.2Mg0.8Fe2O4 was studied for the first time up to 48 GPa at room temperature using x-ray diffraction, Raman spectroscopy, and electrical transport measurements. The sample was cubic (spinel-type Fd (3) over bar 3m) at ambient pressure and underwent a pressure-induced structural transition to an orthorhombic phase (CaTi2O4-type Bbmm) at 21GPa. This structural transformation corresponded to a first-order phase transition that involved 7.5% molar volume shrinkage. The onset of the Mott insulator-metal transition (IMT) around 20 GPa was due to a spin crossover mechanism that led to the Fe3+ magnetic moment collapse. All the Raman modes disappeared at high pressures, which supported metallization. Analysis of structural and electrical transport measurements showed a simultaneous volume collapse and sharp IMT within a narrow pressure range. The orthorhombic high-pressure phase was found to have a higher conductivity than the cubic phase. The pressure dependence of the conductivity supported the metallic behavior of the high-pressure phase. |
| DOI | 10.1103/PhysRevB.95.024107 |
| Indexed By | SCI |
| Language | 英语 |
| WOS ID | WOS:000391851100001 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.sinap.ac.cn/handle/331007/27418 |
| Collection | 中科院上海应用物理研究所2011-2018年 |
| Recommended Citation GB/T 7714 | Rahman, S,Samanta, S,Errandonea, D,et al. Pressure-induced structural evaluation and insulator-metal transition in the mixed spinel ferrite Zn0.2Mg0.8Fe2O4[J]. PHYSICAL REVIEW B,2017,95(2):-. |
| APA | Rahman, S.,Samanta, S.,Errandonea, D.,Yan, S.,Yang, K.,...&Wang, L.(2017).Pressure-induced structural evaluation and insulator-metal transition in the mixed spinel ferrite Zn0.2Mg0.8Fe2O4.PHYSICAL REVIEW B,95(2),-. |
| MLA | Rahman, S,et al."Pressure-induced structural evaluation and insulator-metal transition in the mixed spinel ferrite Zn0.2Mg0.8Fe2O4".PHYSICAL REVIEW B 95.2(2017):-. |
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| Pressure-induced str（3638KB） | 期刊论文 | 作者接受稿 | 开放获取 | CC BY-NC-SA | View Download | |
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