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Title: Phase transition induced strain in ZnO under high pressure

Journal Article · · Scientific Reports
DOI:https://doi.org/10.1038/srep24958· OSTI ID:1282100
 [1];  [2];  [3];  [4];  [4];  [5];  [6]
  1. Sichuan Univ., Chengdu (China). Institute of Atomic and Molecular Physics; Center for High Pressure Science and Technology Advanced Research (HPSTAR), Shanghai (China)
  2. Center for High Pressure Science and Technology Advanced Research (HPSTAR), Shanghai (China); Chinese Academy of Sciences, Guiyang, Guizhou (China). Key Laboratory of High-temperature and High-pressure Study of the Earth’s Interior, Institute of Geochemistry
  3. Chinese Academy of Sciences, Beijing (China). Beijing Synchrotron Radiation Laboratory, Institute of High Energy Physics
  4. Carnegie Inst. of Washington, Argonne, IL (United States). High Pressure Collaborative Access Team (HPCAT)
  5. Sichuan Univ., Chengdu (China). Institute of Atomic and Molecular Physics; Institute of Fluid Physics and National Key Laboratory of Shockwave and Detonation Physics (China); Academy of Engineering Physics, Mianyang (China)
  6. Center for High Pressure Science and Technology Advanced Research (HPSTAR), Shanghai (China)

Under high pressure, the phase transition mechanism and mechanical property of material are supposed to be largely associated with the transformation induced elastic strain. However, the experimental evidences for such strain are scanty. The elastic and plastic properties of ZnO, a leading material for applications in chemical sensor, catalyst, and optical thin coatings, were determined using in situ high pressure synchrotron axial and radial x-ray diffraction. The abnormal elastic behaviors of selected lattice planes of ZnO during phase transition revealed the existence of internal elastic strain, which arise from the lattice misfit between wurtzite and rocksalt phase. Furthermore, the strength decrease of ZnO during phase transition under non-hydrostatic pressure was observed and could be attributed to such internal elastic strain, unveiling the relationship between pressure induced internal strain and mechanical property of material. Ultimately, these findings are of fundamental importance to understanding the mechanism of phase transition and the properties of materials under pressure.

Research Organization:
Carnegie Institute of Washington
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
NA0001974; AC02-06CH11357; FG02-99ER45775
OSTI ID:
1282100
Journal Information:
Scientific Reports, Vol. 6; ISSN 2045-2322
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 14 works
Citation information provided by
Web of Science

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Cited By (3)

Redistribution of native defects and photoconductivity in ZnO under pressure journal January 2019
Tuning to more compressible phase in TiZrHfNb high entropy alloy by pressure journal January 2020
Strain detection in crystalline heterostructures using bidimensional blocking patterns of channelled particles journal February 2018

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