Spin Crossover in Ferropericlase at High Pressure: A Seismologically Transparent Transition?
| العنوان: | Spin Crossover in Ferropericlase at High Pressure: A Seismologically Transparent Transition? |
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| المؤلفون: | C. M. Aracne, Alexey Bosak, Julien Siebert, Michael Krisch, Guillaume Fiquet, Daniel L. Farber, Frederick J. Ryerson, Daniele Antonangeli, Moritz Hoesch, James Badro |
| المساهمون: | Institut de minéralogie et de physique des milieux condensés (IMPMC), Université Pierre et Marie Curie - Paris 6 (UPMC)-IPG PARIS-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Lawrence Livermore National Laboratory (LLNL), Department of Earth and Planetary Sciences [Santa Cruz], University of California [Santa Cruz] (UCSC), University of California-University of California, European Synchrotron Radiation Facility (ESRF), Université Pierre et Marie Curie - Paris 6 (UPMC)-Université Paris Diderot - Paris 7 (UPD7)-Institut de Physique du Globe de Paris (IPG Paris)-Centre National de la Recherche Scientifique (CNRS), University of California [Santa Cruz] (UC Santa Cruz), University of California (UC)-University of California (UC) |
| المصدر: | Science Science, American Association for the Advancement of Science, 2011, 331, pp.1. ⟨10.1126/science.1198429⟩ Science, 2011, 331, pp.1. ⟨10.1126/science.1198429⟩ |
| بيانات النشر: | American Association for the Advancement of Science (AAAS), 2011. |
| سنة النشر: | 2011 |
| مصطلحات موضوعية: | Seismic anisotropy, Bulk modulus, Multidisciplinary, Materials science, 010504 meteorology & atmospheric sciences, Spin states, Condensed matter physics, Spin transition, Mineralogy, engineering.material, 010502 geochemistry & geophysics, 01 natural sciences, Seismic wave, Physics::Geophysics, Spin crossover, engineering, Ferropericlase, Anisotropy, [SDU.STU.MI]Sciences of the Universe [physics]/Earth Sciences/Mineralogy, 0105 earth and related environmental sciences |
| الوصف: | International audience; Seismic discontinuities in Earth typically arise from structural, chemical, or temperature variations with increasing depth. The pressure-induced iron spin state transition in the lower mantle may influence seismic wave velocities by changing the elasticity of iron-bearing minerals, but no seismological evidence of an anomaly exists. Inelastic x-ray scattering measurements on (Mg0.83Fe0.17)O-ferropericlase at pressures across the spin transition show effects limited to the only shear moduli of the elastic tensor. This explains the absence of deviation in the aggregate seismic velocities and, thus, the lack of a one-dimensional seismic signature of the spin crossover. The spin state transition does, however, influence shear anisotropy of ferropericlase and should contribute to the seismic shear wave anisotropy of the lower mantle. |
| تدمد: | 1095-9203 0036-8075 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a15f8b146665eb571fb281dfde0e2763 https://doi.org/10.1126/science.1198429 |
| حقوق: | RESTRICTED |
| رقم الأكسشن: | edsair.doi.dedup.....a15f8b146665eb571fb281dfde0e2763 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 10959203 00368075 |
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