Spin transition of iron in magnesiowustite in the Earth's lower mantle
Article Abstract:
The spin states of iron in magnetsiowustite are studied along with the isolated effects of the electronic transitions on the elasticity of magnesiowustite with in situ X-ray emission spectroscopy and X-ray differ action to pressures of the lowest mantle. The results suggest that an observed high-spin to low-spin transition of iron in magnesiowustite results in an abnormal compressional behavior between the high-spin and the low-spin sates.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2005
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Elasticity and rheology of iron above 220 GPa and the nature of the Earth's inner core
Article Abstract:
Geological research using ultrasound and radial X-ray diffraction indicates that the Earth's core comprises of low-velocity iron components. Iron's aggregate shear-wave velocity is greater than its inner core shear-wave velocity. Velocity information at pressures under 20 GPa and lattice parameters have been obtained using ultrasonic analysis and hydrostatic X-ray diffraction, respectively.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1998
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Origin of morphotropic phase boundaries in ferroelectrics
Article Abstract:
A morphotropic phase boundary is exhibited by piezoelectric compound such as lead titanate under pressure. The high electromechanical coupling in solid solutions with lead titanate could be used to discover high-performance low cost electromechanical materials.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2008
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