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First-principles calculations and Raman scattering evidence for local symmetry lowering in rhombohedral ilmenite: Temperature- and pressure-dependent studies
(2018-11-07)
ATiO3-type materials may exist in two different crystalline forms: the perovskite and ilmenite. While many papers have devoted their attention to evaluating the structural properties of the perovskite phase, the structural ...
Polaron liquid-gas crossover at the orthorhombic-rhombohedral transition of manganites
(AMER PHYSICAL SOC, 2008)
High-resolution synchrotron x-ray powder diffraction in La(0.7)Ca(0.3)MnO(3) shows in detail a first-order structural phase transition from orthorhombic (space-group Pnma) to rhombohedral (space-group R (3) over barc) ...
Fe K-edge X-ray absorption spectroscopy study of Pb(Fe2/3W 1/3)O3-PbTiO3 multiferroic ceramics
(2013-03-21)
The present paper is a comprehensive study concerning Fe K-edge X-ray absorption spectroscopy (XAS) measurements, which were performed to characterize the local structure of (1 - x)Pb(Fe2/3W1/3)O 3-xPbTiO3 samples as a ...
Fe K-edge X-ray absorption spectroscopy study of Pb(Fe2/3W 1/3)O3-PbTiO3 multiferroic ceramics
(2013-03-21)
The present paper is a comprehensive study concerning Fe K-edge X-ray absorption spectroscopy (XAS) measurements, which were performed to characterize the local structure of (1 - x)Pb(Fe2/3W1/3)O 3-xPbTiO3 samples as a ...
Pressure-induced phase transitions in Zr-rich PbZr1-xTixO3 ceramics
(2001-08-20)
A Raman study of structural changes in the Zr-rich PbZr1-x TixO3 (PZT) system under hydrostatic pressures up to 5.0 GPa is presented. We observe that externally applied pressure induces several phase transitions in PZT ...
Pressure-induced phase transitions in Zr-rich PbZr1-xTixO3 ceramics
(2001-08-20)
A Raman study of structural changes in the Zr-rich PbZr1-x TixO3 (PZT) system under hydrostatic pressures up to 5.0 GPa is presented. We observe that externally applied pressure induces several phase transitions in PZT ...
Universal magnetic-field-driven metal-insulator-metal transformations in graphite and bismuth
(American Physical SocCollege PkEUA, 2006)