@article{10902/31400,
year = {2017},
url = {https://hdl.handle.net/10902/31400},
abstract = {This work reports an optical absorption study on CoF2 under high-pressure conditions in the 0-80 GPa range. A recent structural study1 performed on the pressure-induced phase-transition sequence of CoF2 reveals that this compound undergoes a structural transformation associated with a change of Co2+ coordination from 6 (rutile type) to 8 (fluorite type) at 15 GPa, what implies a profound change in the Co2+ electronic ground state associated with the inversion of d orbitals from (t 2g 5 e g2) to (e g 4 t 2g 3). This allows us to explore the Co2+ electronic structure, and hence 10Dq, as a function of the density and the Co-F bond length in both CoF6 (rutile phase) and CoF8 (fluorite phase) coordinations. The results are compared with those obtained in KCoF3 (perovskite) in a wide range of Co-F distances (from 2.04 to 1.83 Å).},
organization = {Financial support from the Spanish Ministerio de Economía y Competitividad (Project No. MAT2015-69508-P) and MALTA INGENIO-CONSOLIDER 2010 (Ref. No. CDS2007-0045) is acknowledged. The ALS is supported by the Director, Office of Science, Office of Basic Energy Sciences of the US Department of Energy, under Contract No. DE-AC02-05CH11231.},
publisher = {Institute of Physics},
publisher = {Journal of Physics: Conference Series, 2017, 950, 042016},
title = {Volume and bond length dependences of the electronic structure of 6-fold and 8-fold coordinated Co2+ in pressure transformed CoF2},
author = {Barreda Argüeso, José Antonio and Aguado Menéndez, Fernando and González Gómez, Jesús Antonio and Valiente Barroso, Rafael and Nataf, L. and Sanz Ortiz, Marta Norah and Rodríguez González, Fernando},
}