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We present structural studies of V1−xCrxO2 (pure, 0.7 %, and 2.5%Cr-doped) compounds at room temperature in a diamond anvil cell for pressures up to 20 GPa using synchrotron x-ray powder diffraction. All the samples studied show a persistence of the monoclinicM1 symmetry between 4 and 12 GPa. Above 12 GPa, the monoclinic M1 symmetry changes to isostructural Mx phase (space group P21/c) with a significant anisotropy in lattice compression of the b-c plane of the M1 phase. This behavior can be reconciled invoking the pressure-induced charge delocalization

Anisotropic compression in the high-pressure regime of pure and chromium-doped vanadium dioxide

MARONI, BEATRICE;MALAVASI, LORENZO
2012-01-01

Abstract

We present structural studies of V1−xCrxO2 (pure, 0.7 %, and 2.5%Cr-doped) compounds at room temperature in a diamond anvil cell for pressures up to 20 GPa using synchrotron x-ray powder diffraction. All the samples studied show a persistence of the monoclinicM1 symmetry between 4 and 12 GPa. Above 12 GPa, the monoclinic M1 symmetry changes to isostructural Mx phase (space group P21/c) with a significant anisotropy in lattice compression of the b-c plane of the M1 phase. This behavior can be reconciled invoking the pressure-induced charge delocalization
2012
Applied Physics/Condensed Matter/Materials Science encompasses the resources of three related disciplines: Applied Physics, Condensed Matter Physics, and Materials Science. The applied physics resources are concerned with the applications of topics in condensed matter as well as optics, vacuum science, lasers, electronics, cryogenics, magnets and magnetism, acoustical physics and mechanics. The condensed matter physics resources are concerned with the study of the structure and the thermal, mechanical, electrical, magnetic and optical properties of condensed matter. They include superconductivity, surfaces, interfaces, thin films, dielectrics, ferroelectrics and semiconductors. The materials science resources are concerned with the physics and chemistry of materials and include ceramics, composites, alloys, metals and metallurgy, nanotechnology, nuclear materials, adhesion and adhesives. Resources dealing with polymeric materials are listed in the Organic Chemistry/Polymer Science category.
PHYSICAL REVIEW. B, CONDENSED MATTER AND MATERIALS PHYSICS
sì
000304393200001
2-s2.0-84861672491
Esperti anonimi
Inglese
Internazionale
STAMPA
85
18
sì
7
info:eu-repo/semantics/article
262
Mitrano, Matteo; Maroni, Beatrice; Marini, Carlo; Hanfland, Michael; Joseph, Boby; Postorino, Paolo; Malavasi, Lorenzo
1 Contributo su Rivista::1.1 Articolo in rivista
none
1.1 Articolo in rivista
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11571/447956
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