LiCrO2 under pressure : In-situ structural and vibrational studies
Garg, Alka B. (Homi Bhabha National Institute)
Errandonea, Daniel (Universitat de València. Departament de Física Aplicada i Electromagnetisme)
Pellicer Porres, Julio (Universitat de València. Departament de Física Aplicada i Electromagnetisme)
Martínez García, Domingo (Universitat de València. Departament de Física Aplicada i Electromagnetisme)
Kesari, Swayam (BHF Glasgow Cardiovascular Research Centre)
Rao, Rekha (BHF Glasgow Cardiovascular Research Centre)
Popescu, Catalin (Laboratori de Llum del Sincrotró ALBA)
Bettinelli, Marco (University of Verona)

Date:	2019
Abstract:	The high-pressure behaviour of LiCrO, a compound isostructural to the battery compound LiCoO, has been investigated by synchrotron-based angle-dispersive X-ray powder diffraction, Raman spectroscopy, and resistance measurements up to 41, 30, and 10 Gpa, respectively. The stability of the layered structured compound on a triangular lattice with R-3m space group is confirmed in all three measurements up to the highest pressure reached. The dependence of lattice parameters and unit-cell volume with pressure has been determined from the structural refinements of X-ray diffraction patterns that are used to extract the axial compressibilities and bulk modulus by means of Birch-Murnaghan equation-of-state fits. The pressure coefficients for the two Raman-active modes, A and E, and their mode-Grüneisen parameters are reported. The electrical resistance measurements indicate that pressure has little influence in the resistivity up to 10 GPa. The obtained results for the vibrational and structural properties of LiCrO under pressure are in line with the published results of the similar studies on the related compounds. Research work reported in this article contributes significantly to enhance the understanding on the structural and mechanical properties of LiCrO and related lithium compounds.
Grants:	Ministerio de Economía y Competitividad MAT2016-75586-C4-1-P
Rights:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Language:	Anglès
Document:	Article ; recerca ; Versió publicada
Subject:	High-pressure ; X-ray diffraction ; Raman spectroscopy ; Equation of state
Published in:	Crystals, Vol. 9, Issue 1 (January 2019) , art. 2, ISSN 2073-4352

DOI: 10.3390/cryst9010002

18 p, 5.1 MB

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Research literature > UAB research groups literature > Research Centres and Groups (research output) > Experimental sciences > The ALBA Synchrotron
Articles > Research articles
Articles > Published articles