Direct Observations of a Dynamically Driven Phase Transition with in situ X-Ray Diffraction in a Simple Ionic Crystal
| العنوان: | Direct Observations of a Dynamically Driven Phase Transition with in situ X-Ray Diffraction in a Simple Ionic Crystal |
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| المؤلفون: | Seth Root, Paul Elliott Specht, Melanie White, Stanislav V. Sinogeikin, Andrew Cornelius, Nicholas Sinclair, Jesse S. Smith, Patricia Kalita, Adam Schuman |
| المصدر: | Physical Review Letters. 119 |
| بيانات النشر: | American Physical Society (APS), 2017. |
| سنة النشر: | 2017 |
| مصطلحات موضوعية: | Diffraction, Phase transition, Materials science, Rietveld refinement, General Physics and Astronomy, Ionic bonding, Thermodynamics, 02 engineering and technology, 021001 nanoscience & nanotechnology, Kinetic energy, 01 natural sciences, Synchrotron, law.invention, Hysteresis, law, 0103 physical sciences, X-ray crystallography, 010306 general physics, 0210 nano-technology |
| الوصف: | We report real-time observations of a phase transition in the ionic solid ${\mathrm{CaF}}_{2}$, a model $A{B}_{2}$ structure in high-pressure physics. Synchrotron x-ray diffraction coupled with dynamic loading to 27.7 GPa, and separately with static compression, follows, in situ, the fluorite to cotunnite structural phase transition, both on nanosecond and on minute time scales. Using Rietveld refinement techniques, we examine the kinetics and hysteresis of the transition. Our results give insight into the kinetic time scale of the fluorite-cotunnite phase transition under shock compression, which is relevant to a number of isomorphic compounds. |
| تدمد: | 1079-7114 0031-9007 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::36402a225114d458b591a1c98ee13337 https://doi.org/10.1103/physrevlett.119.255701 |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....36402a225114d458b591a1c98ee13337 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 10797114 00319007 |
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