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
发表期刊PHYSICAL REVIEW B
ISSN2469-9950
卷号95期号:2页码:-
文章类型期刊论文
摘要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.
DOI10.1103/PhysRevB.95.024107
收录类别SCI
语种英语
WOS记录号WOS:000391851100001
引用统计
被引频次:6[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.sinap.ac.cn/handle/331007/27418
专题中科院上海应用物理研究所2011-2018年
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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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