1. Department of Physics, Pontifical Catholic University of Rio de Janeiro, Rio de Janeiro, 22451-900, RJ, Brazil
2. Division of Metrology of Materials, National Institute of Metrology, Standardization and Industrial Quality (INMETRO), Duque de Caxias, 252250-020, RJ, Brazil
3. Department of Chemistry, Federal University of Santa Catarina, Florianópolis, 88040-900, SC, Brazil
4. São Carlos Institute of Physics, University of São Paulo, São Carlos, 13560-970, SP, Brazil
5. Department of Physics, Federal University of Juiz de Fora, Juiz de Fora, 36036-900, MG, Brazil
6. Department of Physics, Federal University of Santa Catarina, Florianópolis, 88040-900, SC, Brazil