中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
Micro-stress dominant displacive reconstructive transition in lithium aluminate

文献类型:期刊论文

作者Li XD(李晓东); Li, XD; Zhang, LL; Yan, XZ; Lei, L; Hu, QW; Peng, F; He, DW
刊名APPLIED PHYSICS LETTERS
出版日期2016
卷号109期号:7
DOI10.1063/1.4961236
英文摘要It is supposed that diffusive reconstructive transitions usually take place under hydrostatic pressure or low stresses, and displacive reconstructive phase transitions easily occur at nonhydrostatic pressure. Here, by in-situ high pressure synchrotron X-ray diffraction and single-crystal Raman scattering studies on lithium aluminate at room temperature, we show that the reconstructive transition mechanism is dependent on the internal microscopic stresses rather than the macroscopic stresses. In this case, even hydrostatic pressure can favor the displacive transition if the compressibility of crystal is anisotropic. During hydrostatic compression, gamma-LiAlO2 transforms to delta-LiAlO2 at about 4GPa, which is much lower than that in previous nonhydrostatic experiments (above 9GPa). In the region where both phases coexist, there are enormous microscopic stresses stemming from the lattice mismatch, suggesting that this transition is displacive. Furthermore, the atomic picture is drawn with the help of the shear Raman modes. Published by AIP Publishing.
语种英语
WOS记录号WOS:000383787400018
源URL[http://ir.ihep.ac.cn/handle/311005/260331]  
专题高能物理研究所_多学科研究中心
作者单位中国科学院高能物理研究所
推荐引用方式
GB/T 7714
Li XD,Li, XD,Zhang, LL,et al. Micro-stress dominant displacive reconstructive transition in lithium aluminate[J]. APPLIED PHYSICS LETTERS,2016,109(7).
APA 李晓东.,Li, XD.,Zhang, LL.,Yan, XZ.,Lei, L.,...&He, DW.(2016).Micro-stress dominant displacive reconstructive transition in lithium aluminate.APPLIED PHYSICS LETTERS,109(7).
MLA 李晓东,et al."Micro-stress dominant displacive reconstructive transition in lithium aluminate".APPLIED PHYSICS LETTERS 109.7(2016).

入库方式: OAI收割

来源:高能物理研究所

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