Structural and Vibrational Properties of Corundum-type In2O3 Nanocrystals under Compression

Sans, J.A.; Vilaplana, R.; Errandonea, D.; Cuenca-Gotor, V.P.; García-Domene, B.; Popescu, C.; Manjón, F.J.; Singhal, A.; Achary, S.N.; Martínez-García, D.; Pellicer-Porres, J.; Rodríguez-Hernández, P.; Muñoz, A.

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Date

2017

URI

http://riull.ull.es/xmlui/handle/915/4535

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 compare nicely with theoretical simulations on bulk rh-In2O3. Nanocrystalline rh-In2O3 showed stability under compression at least up to 20 GPa, unlike bulk rh-In2O3 which gradually transforms to the orthorhombic Pbca (Rh2O3-III-type) structure above 12-14 GPa. The different stability range found in nanocrystalline and bulk In2O3 is discussed.

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Except where otherwise noted, this item's license is described as Licencia Creative Commons (Reconocimiento-No comercial-Sin obras derivadas 4.0 internacional)