1. Centro de Investigación y de Estudios Avanzados del IPN, Unidad Querétaro, Apdo, Postal 1-798, 76001, Querétaro, Querétaro, Mexico
2. Facultad de Metalurgia, Universidad Autónoma de Coahuila, Carr. 57, km. 5, C.P.25720, Monclova, Coahuila, Mexico
3. Department of Materials Science and Engineering, The University of Texas at Dallas, 800 West Campbell Road, Richardson, Texas 75080, USA
4. Department of Electrical and Computer Engineering, The University of Texas at Dallas, 800 West Campbell Road, Richardson, Texas, 75080, USA