Hardness and elasticity in cubic ruthenium dioxide

Authors
Leger, JM Djemia, P Ganot, F Haines, J Pereira, AS da Jornada, JAH
Citation
Jm. Leger et al., Hardness and elasticity in cubic ruthenium dioxide, APPL PHYS L, 79(14), 2001, pp. 2169-2171
Citations number
20
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
APPLIED PHYSICS LETTERS
ISSN journal
00036951 → ACNP
Volume
79
Issue
14
Year of publication
2001
Pages
2169 - 2171
Database
ISI
SICI code
0003-6951(20011001)79:14<2169:HAEICR>2.0.ZU;2-D
Abstract
The Knoop hardness of the highly incompressible cubic phase of ruthenium di oxide was found to be 19-20 GPa from indentation tests. This value scales w ell with the shear modulus approximated by the elastic constant C-44 of 144 GPa obtained from Brillouin scattering measurements. This work provides ev idence that the shear modulus is a better indicator of hardness than the bu lk modulus for ionic and covalent materials. (C) 2001 American Institute of Physics.