Skip to main content Accessibility help
×
Home

Ferromagnetism in Nanocrystalline Powders and Thin Films of Cobalt-Vanadium co-doped Zinc Oxide

  • Marco Gálvez-Saldaña (a1), Gina Montes-Albino (a2) and Oscar Perales-Perez (a3)

Abstract

A systematic study was carried out to determine the effect of the composition and annealing atmosphere (air and N2) on the structural, optical and magnetic properties of pure, doped and co-doped ZnO [Zn(1-y)(CoV)yO] nanocrystalline powders and films. The (Co+V) doping level, ‘y’, was fixed at 2 at% with variable individual concentrations of Co and V species. Powders and films were synthesized via a sol-gel approach where the films were grown on silicon (100) substrates. X-ray diffractometry verified the formation of the ZnO host structure after annealing of the precursor phases. The variation of the average crystallite size of Co-V (2 at.%) ZnO powders annealed in air at 500°C were negligible and averaged 33 nm. Photoluminescence (PL) measurements of powder corroborated the formation of high-quality ZnO host structure, as well as in films annealed in air. In turn, XRD and PL measurements confirmed an enhanced crystallinity of the ZnO host, with an average crystallite size of 41 nm, for films annealed at 500°C under a N2 atmosphere. M-H measurements evidenced a ferromagnetic behavior at room temperature in powders and films that was dependent on the type and amount of the dopant species.

Copyright

References

Hide All
[1] Özgür, Ü., et al. ., Journal of Applied Physics 98, 041301, (2005).
[2] Pan, F., Song, C., et al. , Materials Science and Engineering R 62, 135, (2008).
[3] Qi, Jing, Gao, Daqiang, et al. , Appl Phys A. 100, 7982 (2010).
[4] Gálvez, M., et al. , Mater. Res. Soc. Symp. Proc. Vol. 1368, DOI: 10.1557/opl.2011.1038.
[5] Barnes, T.M., et al. , J. Cryst. Growth, 274, 412417, (2005).
[6] Kang, D.J., et al. , Thin Solid Films 475, 160165, (2005).
[7] Hyun Kim, J., et al. , Journal Applied Physics, 92, 10, (2002).
[8] Petersen, J., Microelectronics Journal 40, 239241, (2009).
[9] Kim, Seong Keun, et al. , Thin Solid Films 478, 103108, (2005)
[10] Wang, Liwei, et al. , Thin Solid Films 517, 37213725 (2009)
[11] Grundmann, Marius, Handbook The Physics of Semiconductors: An Introduction Including Nanophysics and Applications, Springer, Second edition, 291292, (2010).
[12] Lu, J.J., et al. , Optical Materials 29, 15481552, (2007).
[13] Shionoya, S. and Yen, W.M., Phosphor Handbook, CRC Press, Boca Raton, Florida (1999).
[14] Vanheusden, K., et al. , Appl. Phys. Lett. 68, 403, (1996).
[15] Samanta, P. K., International Journal of NanoScience and Nanotechnology ISSN 0974– 3081, 1, 8190 (2009).
[16] Janotti, Anderson and Van de Walle, Chris G, Rep. Prog. Phys. 72, 126501, (2009).
[17] Singh, Shubra, et al. , New Journal of Physics 12, 023007 (2010)
[18] Coey, J.M.D., Venkatesan, M., Fitzgerald, C.B., Nat. Mater. 4, 173, (2005).

Keywords

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed