Unveiling pressure-induced anomalous shear behavior and thermoelasticity of α-Fe2O3 hematite at high pressure
Summary: Hematite (α-Fe2O3), as an important end-member of FeO-Fe2O3 series, has garnered particular interest for its peculiar high pressure-temperature (P-T) behavior, structural stability and elasticity, and the unclear role of Fe3+ in the nature and dynamics of the Earth’s mantle. Here, we report...
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Elsevier
2025-02-01
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| author | Yongtao Zou Pei Wang Ying Li Haiyan Chen Cangtao Zhou Tetsuo Irifune |
| author_facet | Yongtao Zou Pei Wang Ying Li Haiyan Chen Cangtao Zhou Tetsuo Irifune |
| author_sort | Yongtao Zou |
| collection | DOAJ |
| description | Summary: Hematite (α-Fe2O3), as an important end-member of FeO-Fe2O3 series, has garnered particular interest for its peculiar high pressure-temperature (P-T) behavior, structural stability and elasticity, and the unclear role of Fe3+ in the nature and dynamics of the Earth’s mantle. Here, we report a pronounced pressure-induced anomaly in the shear behavior of hematite at room temperature and ∼3.5 GPa owing to the (weak)ferromagnetic-to-antiferromagnetic Morin transition driven by pressure and temperature. Unexpectedly, this phase-transition-driven anomalous behavior at high P-T is absent in the compressional velocities. The bulk and shear moduli, as well as their pressure and temperature dependences for Fe2O3 hematite are reported, yielding KS0 = 235.5(8) GPa, G0 = 88.0(3) GPa, әKS/әP = 3.29(25), dG/dP = 1.36(10), әKS/әT = −0.027(2) GPa/K, and әG/әT = −0.019(1) GPa/K. These findings and high-P thermoelasticity will be of significant importance for good understanding of the underlying mechanism for phase-transition-induced anomaly at high pressures and temperatures in the shear behavior of Fe-O materials. |
| format | Article |
| id | doaj-art-79a181e8a86a469db11258458e253246 |
| institution | Kabale University |
| issn | 2589-0042 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | Elsevier |
| record_format | Article |
| series | iScience |
| spelling | doaj-art-79a181e8a86a469db11258458e2532462025-02-08T05:00:53ZengElsevieriScience2589-00422025-02-01282111905Unveiling pressure-induced anomalous shear behavior and thermoelasticity of α-Fe2O3 hematite at high pressureYongtao Zou0Pei Wang1Ying Li2Haiyan Chen3Cangtao Zhou4Tetsuo Irifune5College of Engineering Physics, and Shenzhen Key Laboratory of Ultraintense Laser & Advanced Material Technology, Shenzhen Technology University, Shenzhen 518118, China; Corresponding authorKey Laboratory of Materials Physics, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences, Hefei 230031, ChinaUnited Laboratory of High-Pressure Physics and Earthquake Science, Institute of Earthquake Forecasting, China Earthquake Administration, Beijing 100036, ChinaMineral Physics Institute, State University of New York, Stony Brook, NY 11790, USACollege of Engineering Physics, and Shenzhen Key Laboratory of Ultraintense Laser & Advanced Material Technology, Shenzhen Technology University, Shenzhen 518118, ChinaGeodynamics Research Center, Ehime University, Matsuyama 790-8577, JapanSummary: Hematite (α-Fe2O3), as an important end-member of FeO-Fe2O3 series, has garnered particular interest for its peculiar high pressure-temperature (P-T) behavior, structural stability and elasticity, and the unclear role of Fe3+ in the nature and dynamics of the Earth’s mantle. Here, we report a pronounced pressure-induced anomaly in the shear behavior of hematite at room temperature and ∼3.5 GPa owing to the (weak)ferromagnetic-to-antiferromagnetic Morin transition driven by pressure and temperature. Unexpectedly, this phase-transition-driven anomalous behavior at high P-T is absent in the compressional velocities. The bulk and shear moduli, as well as their pressure and temperature dependences for Fe2O3 hematite are reported, yielding KS0 = 235.5(8) GPa, G0 = 88.0(3) GPa, әKS/әP = 3.29(25), dG/dP = 1.36(10), әKS/әT = −0.027(2) GPa/K, and әG/әT = −0.019(1) GPa/K. These findings and high-P thermoelasticity will be of significant importance for good understanding of the underlying mechanism for phase-transition-induced anomaly at high pressures and temperatures in the shear behavior of Fe-O materials.http://www.sciencedirect.com/science/article/pii/S2589004225001658Materials scienceMaterials characterizationMagnetic materialsMaterials physics |
| spellingShingle | Yongtao Zou Pei Wang Ying Li Haiyan Chen Cangtao Zhou Tetsuo Irifune Unveiling pressure-induced anomalous shear behavior and thermoelasticity of α-Fe2O3 hematite at high pressure iScience Materials science Materials characterization Magnetic materials Materials physics |
| title | Unveiling pressure-induced anomalous shear behavior and thermoelasticity of α-Fe2O3 hematite at high pressure |
| title_full | Unveiling pressure-induced anomalous shear behavior and thermoelasticity of α-Fe2O3 hematite at high pressure |
| title_fullStr | Unveiling pressure-induced anomalous shear behavior and thermoelasticity of α-Fe2O3 hematite at high pressure |
| title_full_unstemmed | Unveiling pressure-induced anomalous shear behavior and thermoelasticity of α-Fe2O3 hematite at high pressure |
| title_short | Unveiling pressure-induced anomalous shear behavior and thermoelasticity of α-Fe2O3 hematite at high pressure |
| title_sort | unveiling pressure induced anomalous shear behavior and thermoelasticity of α fe2o3 hematite at high pressure |
| topic | Materials science Materials characterization Magnetic materials Materials physics |
| url | http://www.sciencedirect.com/science/article/pii/S2589004225001658 |
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