1. Department of Physics, Midwestern Paraná State University (Unicentro), Guarapuava, PR 85040-167, Brazil
2. Department of Physics, State University of Maringá (UEM), Maringá, PR 87020-900, Brazil
3. Helmoltz-Zentrum Berlin fur Materialien und Energie GmbH (HZB), 14109 Berlin, Germany
4. Department of Physics, Federal University of Rio Grande do Norte (UFRN), Natal, RN 59078-970, Brazil
5. Department of Physics, Federal University of São Carlos (UFSCar), São Carlos, SP 13565-905, Brazil
6. Department of Electrical and Computer Engineering, University of Texas at San Antonio (UTSA), San Antonio, Texas 78249, USA