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Title: Solid Iron Compressed Up to 560 GPa [Fe at Earth core conditions probed by EXAFS]

Abstract

Dynamic compression by multiple shocks is used to compress iron up to 560 GPa (5.6 Mbar), the highest solid-state pressure yet attained for iron in the laboratory. Extended x-ray absorption fine structure (EXAFS) spectroscopy offers simultaneous density, temperature, and local-structure measurements for the compressed iron. The data show that the close-packed structure of iron is stable up to 560 GPa, the temperature at peak compression is significantly higher than expected from pure compressive work, and the dynamic strength of iron is many times greater than the static strength based on lower pressure data. The results provide the first constraint on the melting line of iron above 400 GPa.

Authors:
 [1];  [1];  [1];  [2];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [2];  [1]
  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  2. Univ. of Rochester, NY (United States). Lab. for Laser Energetics
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1466948
Alternate Identifier(s):
OSTI ID: 1104370
Report Number(s):
LLNL-JRNL-505552
Journal ID: ISSN 0031-9007; PRLTAO; 524250
Grant/Contract Number:  
AC52-07NA27344
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 111; Journal Issue: 6; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Ping, Y., Coppari, F., Hicks, D. G., Yaakobi, B., Fratanduono, D. E., Hamel, S., Eggert, J. H., Rygg, J. R., Smith, R. F., Swift, D. C., Braun, D. G., Boehly, T. R., and Collins, G. W. Solid Iron Compressed Up to 560 GPa [Fe at Earth core conditions probed by EXAFS]. United States: N. p., 2013. Web. doi:10.1103/PhysRevLett.111.065501.
Ping, Y., Coppari, F., Hicks, D. G., Yaakobi, B., Fratanduono, D. E., Hamel, S., Eggert, J. H., Rygg, J. R., Smith, R. F., Swift, D. C., Braun, D. G., Boehly, T. R., & Collins, G. W. Solid Iron Compressed Up to 560 GPa [Fe at Earth core conditions probed by EXAFS]. United States. doi:10.1103/PhysRevLett.111.065501.
Ping, Y., Coppari, F., Hicks, D. G., Yaakobi, B., Fratanduono, D. E., Hamel, S., Eggert, J. H., Rygg, J. R., Smith, R. F., Swift, D. C., Braun, D. G., Boehly, T. R., and Collins, G. W. Mon . "Solid Iron Compressed Up to 560 GPa [Fe at Earth core conditions probed by EXAFS]". United States. doi:10.1103/PhysRevLett.111.065501. https://www.osti.gov/servlets/purl/1466948.
@article{osti_1466948,
title = {Solid Iron Compressed Up to 560 GPa [Fe at Earth core conditions probed by EXAFS]},
author = {Ping, Y. and Coppari, F. and Hicks, D. G. and Yaakobi, B. and Fratanduono, D. E. and Hamel, S. and Eggert, J. H. and Rygg, J. R. and Smith, R. F. and Swift, D. C. and Braun, D. G. and Boehly, T. R. and Collins, G. W.},
abstractNote = {Dynamic compression by multiple shocks is used to compress iron up to 560 GPa (5.6 Mbar), the highest solid-state pressure yet attained for iron in the laboratory. Extended x-ray absorption fine structure (EXAFS) spectroscopy offers simultaneous density, temperature, and local-structure measurements for the compressed iron. The data show that the close-packed structure of iron is stable up to 560 GPa, the temperature at peak compression is significantly higher than expected from pure compressive work, and the dynamic strength of iron is many times greater than the static strength based on lower pressure data. The results provide the first constraint on the melting line of iron above 400 GPa.},
doi = {10.1103/PhysRevLett.111.065501},
journal = {Physical Review Letters},
number = 6,
volume = 111,
place = {United States},
year = {2013},
month = {8}
}

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