title: Structural and vibrational properties of corundum-type In2O3nanocrystals under compression.
abstract: This work reports the structural and vibrational properties of nanocrystals of corundum-type In2O3(rh-In2O3) at high pressures by using angle-dispersive x-ray diffraction and Raman scattering measurements up to 30 GPa. The equation of state and the pressure dependence of the Raman-active modes of the corundum phase in nanocrystals are in good agreement with previous studies on bulk material and theoretical simulations on bulk rh-In2O3. Nanocrystalline rh-In2O3showed stability under compression at least up to 20 GPa, unlike bulk rh-In2O3which gradually transforms to the orthorhombic Pbca (Rh2O3-III-type) structure above 12-14 GPa. The different stability range found in nanocrystalline and bulk corundum-type In2O3is discussed.
authors.affiliation: Instituto de Diseño para la Fabricación y Producción Automatizada, MALTA Consolider Team-Universitat Politècnica de València, E-46022 València, Spain.
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authors.initials: JA
authors.lastname: Sans
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authors.lastname: Vilaplana
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authors.lastname: Errandonea
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authors.initials: VP
authors.lastname: Cuenca-Gotor
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authors.lastname: García-Domene
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authors.lastname: Popescu
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authors.lastname: Manjón
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authors.lastname: Singhal
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authors.lastname: Achary
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authors.lastname: Martinez-Garcia
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authors.lastname: Pellicer-Porres
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authors.lastname: Rodríguez-Hernández
authors.forename: A
authors.initials: A
authors.lastname: Muñoz