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Title: X-ray tracking of structural changes during a subnanosecond solid-solid phase transition in cobalt nanoparticles

Abstract

This work presents measurements of laser-induced solid-solid phase transitions in Co nanoparticles, using time-resolved wide-angle x-ray scattering with <100-ps time resolution. A comparison of the experimental results with scattering simulations indicates a phase transition from the as-synthesized ε phase into a mixed phase of 2/3 hcp and 1/3 fcc character during the first 100 ps. The measured scattering signal observed at the shortest investigated time delay of 20 ps has less scattering intensity at the dominant fcc/hcp Bragg peak positions compared to the difference signal acquired at 100 ps. This suggests the formation of a partially disordered solid intermediate phase on the sub-100-ps timescale.

Authors:
ORCiD logo [1]; ORCiD logo [1];  [2];  [3]; ORCiD logo [4];  [5];  [4];  [4];  [6]; ORCiD logo [1]; ORCiD logo [1]
+ Show Author Affiliations
  1. Technical Univ. of Denmark, Lyngby (Denmark)
  2. Technical Univ. of Denmark, Lyngby (Denmark); SLAC National Accelerator Lab., Menlo Park, CA (United States). Photon Ultrafast Laser Science and Engineering Inst. (PULSE)
  3. Univ. of Copenhagen (Denmark). The Niels Bohr Inst.
  4. European Synchrotron Radiation Facility (ESRF), Grenoble (France)
  5. European Synchrotron Radiation Facility (ESRF), Grenoble (France); European X-ray Free-Electron Laser (XFEL), Hamburg (Germany)
  6. European X-ray Free-Electron Laser (XFEL), Hamburg (Germany); Univ. of Copenhagen (Denmark). The Niels Bohr Inst.
Publication Date:
Research Org.:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1605027
Grant/Contract Number:  
AC02-76SF00515
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 100; Journal Issue: 24; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
Nanocrystals; Phase transitions; Structural properties

Citation Formats

Vester, Peter, Christensen, Morten, Biasin, Elisa, Mariager, Simon O., Newby, Gemma, Khakhulin, Dmitry, Zontone, Federico, Wulff, Michael, Feidenhans'l, Robert, Nielsen, Martin M., and Haldrup, Kristoffer. X-ray tracking of structural changes during a subnanosecond solid-solid phase transition in cobalt nanoparticles. United States: N. p., 2019. Web. doi:10.1103/physrevb.100.245425.
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Vester, Peter, Christensen, Morten, Biasin, Elisa, Mariager, Simon O., Newby, Gemma, Khakhulin, Dmitry, Zontone, Federico, Wulff, Michael, Feidenhans'l, Robert, Nielsen, Martin M., & Haldrup, Kristoffer. X-ray tracking of structural changes during a subnanosecond solid-solid phase transition in cobalt nanoparticles. United States. doi:10.1103/physrevb.100.245425.
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Vester, Peter, Christensen, Morten, Biasin, Elisa, Mariager, Simon O., Newby, Gemma, Khakhulin, Dmitry, Zontone, Federico, Wulff, Michael, Feidenhans'l, Robert, Nielsen, Martin M., and Haldrup, Kristoffer. Mon . "X-ray tracking of structural changes during a subnanosecond solid-solid phase transition in cobalt nanoparticles". United States. doi:10.1103/physrevb.100.245425.
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@article{osti_1605027,
title = {X-ray tracking of structural changes during a subnanosecond solid-solid phase transition in cobalt nanoparticles},
author = {Vester, Peter and Christensen, Morten and Biasin, Elisa and Mariager, Simon O. and Newby, Gemma and Khakhulin, Dmitry and Zontone, Federico and Wulff, Michael and Feidenhans'l, Robert and Nielsen, Martin M. and Haldrup, Kristoffer},
abstractNote = {This work presents measurements of laser-induced solid-solid phase transitions in Co nanoparticles, using time-resolved wide-angle x-ray scattering with <100-ps time resolution. A comparison of the experimental results with scattering simulations indicates a phase transition from the as-synthesized ε phase into a mixed phase of 2/3 hcp and 1/3 fcc character during the first 100 ps. The measured scattering signal observed at the shortest investigated time delay of 20 ps has less scattering intensity at the dominant fcc/hcp Bragg peak positions compared to the difference signal acquired at 100 ps. This suggests the formation of a partially disordered solid intermediate phase on the sub-100-ps timescale.},
doi = {10.1103/physrevb.100.245425},
journal = {Physical Review B},
number = 24,
volume = 100,
place = {United States},
year = {2019},
month = {12}
}
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Journal Article:
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DOI:  10.1103/physrevb.100.245425
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