1. Thin Film Physics Division, Department of Physics, Chemistry and Biology (IFM), Linköping University, Linköping SE 581 83, Sweden
2. Machadornos LTDA - Cursos, Mentoria e Consultoria, Rua Lindolfo Rocha, 47−2° Centro, Jequié, Bahia 45200-120, Brazil
3. Materials Science and Engineering, School for Engineering of Matter, Transport and Energy, Arizona State University, 551 E. Tyler Mall, Tempe, Arizona 85287, United States
4. Instituto Federal de Educação, Ciência e Tecnologia Baiano, Itaberaba, Bahia 46880-000, Brazil