Thermally Induced Anomaly in the Shear Behavior of Magnetite at High Pressure

Zou, Yongtao1,2,3,4; Zhang, Wei5; Chen, Ting3,4; Li, Xing-ao6; Wang, Chun-Hai1,2; Qi, Xintong3,4; Wang, Shanmin1,2; Yu, Tony7; Liu, Bingbing8; Wang, Yanbin7; Liebermann, Robert C.3,4; Zhao, Yusheng1,2; Li, Baosheng3,4

2018-08-09

10.1103/PhysRevApplied.10.024009

Physical Review Applied   影响因子和分区

2331-7019

Thermoelasticity and acoustic velocities of polycrystalline magnetite are studied at simultaneously high pressures and temperatures up to 8.6 GPa and 1123 K using ultrasonic interferometry in conjunction with in situ x-ray techniques. Here, we report temperature-driven anomalies in the shear behavior at temperatures up to similar to 450 K, together with pressure-induced softening in the shear properties. Fitting the current data to finite strain equations, we obtain the bulk and shear moduli, as well as their pressure and temperature dependences, namely B-S0 = 173.2(5) GPa, G(0) = 55.5(2) GPa, partial derivative B-S/partial derivative P = 2.99(9), partial derivative G/partial derivative P = -0.23(3), partial derivative B-S/partial derivative T= -0.0209(10) GPa/K, partial derivative G/partial derivative T= 0.0042(4) GPa/K, (partial derivative B-2(S)/partial derivative T-2)(P) = -1.7(1) x 10(-5) GPa(2)/K-2, and (partial derivative(2)G/partial derivative T-2)(P) = -2.5(1) x 10(-5) GPa(2)/K-2. The origin of the thermally induced anomaly in the shear modulus for Fe3O4 magnetite is ascribed to the coupling of local atomic distortions and short-range charge ordering of sixfold-coordinated Fe2+ and Fe3+ ions at the octahedral sites in the inverse-spinel structure. These findings or results provide high-P thermoelasticity data of magnetite and present an opportunity to gain a good understanding of the underlying mechanism of temperature-driven anomalies in magnetite-based solid solutions and spinel-structured materials for their applications in extreme conditions.

SCI ; EI

英语

第一 ; 通讯

DOE Office of Science[DE-AC02-06CH11357]

Physics

Physics, Applied

WOS:000441238900002

AMER PHYSICAL SOC

20191306693737

Elastic moduli ; Elasticity ; Iron oxides ; Magnetite ; Shear strain ; Temperature distribution ; Thermoelasticity

Fluid Flow, General:631.1 ; Thermodynamics:641.1 ; Inorganic Compounds:804.2 ; Mechanics:931.1 ; Physical Properties of Gases, Liquids and Solids:931.2 ; Materials Science:951

Web of Science

1.Southern Univ Sci & Technol, Acad Adv Interdisciplinary Studies, Shenzhen 518055, Peoples R China
2.Southern Univ Sci & Technol, Dept Phys, Shenzhen 518055, Peoples R China
3.SUNY Stony Brook, Mineral Phys Inst, Stony Brook, NY 11794 USA
4.SUNY Stony Brook, Dept Geosci, Stony Brook, NY 11794 USA
5.Southwest Univ Sci & Technol, Sch Sci, Mianyang 610064, Sichuan, Peoples R China
6.Nanjing Univ Posts & Telecommun, Sch Sci, Nanjing 210046, Jiangsu, Peoples R China
7.Univ Chicago, Ctr Adv Radiat Sources, Chicago, IL 60637 USA
8.Jilin Univ, State Key Lab Superhard Mat, Changchun 130012, Jilin, Peoples R China

Zou, Yongtao,Zhang, Wei,Chen, Ting,et al. Thermally Induced Anomaly in the Shear Behavior of Magnetite at High Pressure[J]. Physical Review Applied,2018,10(2).

Zou, Yongtao.,Zhang, Wei.,Chen, Ting.,Li, Xing-ao.,Wang, Chun-Hai.,...&Li, Baosheng.(2018).Thermally Induced Anomaly in the Shear Behavior of Magnetite at High Pressure.Physical Review Applied,10(2).

Zou, Yongtao,et al."Thermally Induced Anomaly in the Shear Behavior of Magnetite at High Pressure".Physical Review Applied 10.2(2018).