artículo con referato
"Monoclinic-Orthorhombic Phase Transition in Ba2Cu(HCOO)4 Crystals: A Raman Scattering Study"
C.W.A. Paschoal, A.P. Ayala, I. Guedes, P.T.C. Freire, F.E.A. Melo, J. Mendes Filho, A.G. Leyva, G. Polla, D. Vega and P.K. Perazzo
J. Raman. Spectrosc. 33(1) (2002) 37-41
Abstract
The monoclinic-orthorrombic phase transition in Ba2Cu(HCOO)6crystals, which takes place when the temperature is raised from 300 to 317K, was analysed in the light of Raman sacttering measurements. The disappearance of two modes related to HCOO vibratiosn is interpreted as the signature of phase transformation which is characterized by slight modifications in the atomic positions of HCOO in the unit cell. For the sake of completeness, we also show the evolution of the Raman spectrum from 50 to 300K, where no phase transformation is observed.
DIVISION MATERIA CONDENSADA
