Hostname: page-component-78c5997874-s2hrs Total loading time: 0 Render date: 2024-11-04T21:09:37.099Z Has data issue: false hasContentIssue false
  • English
  • Français

Structural and Magnetic Properties of Granular Co-ZrO2 Films

Published online by Cambridge University Press:  01 February 2011

Z Konstantinović ,
M García del Muro ,
B J Hattink ,
M Varela ,
X Batlle  and
A Labarta
Z Konstantinović
Affiliation:
Departament de Fïsica Aplicada i òptica, Universitat de Barcelona, Avinguda Diagonal 647, 08028-Barcelona, Spain
M García del Muro
Affiliation:
Departament de Fïsica Aplicada i òptica, Universitat de Barcelona, Avinguda Diagonal 647, 08028-Barcelona, Spain
B J Hattink
Affiliation:
Departament de Fïsica Aplicada i òptica, Universitat de Barcelona, Avinguda Diagonal 647, 08028-Barcelona, Spain
M Varela
Affiliation:
Departament de Fïsica Aplicada i òptica, Universitat de Barcelona, Avinguda Diagonal 647, 08028-Barcelona, Spain
X Batlle
Affiliation:
Departament de Fïsica Aplicada i òptica, Universitat de Barcelona, Avinguda Diagonal 647, 08028-Barcelona, Spain
A Labarta
Affiliation:
Departament de Fïsica Aplicada i òptica, Universitat de Barcelona, Avinguda Diagonal 647, 08028-Barcelona, Spain
Get access

Abstract

We present here the growth of Co-ZrO2 granular films by pulsed laser deposition (PLD). Co-ZrO2 prepared with PLD is an ideal system for investigating the properties of magnetic nanoparticle since the Co-ZrO2 interfaces are of high quality with no evidence of intermixing. The average composition of the samples is determined by x-ray photoemission spectroscopy and microprobe exsperiments. High resolution scanning electron microscopy shows existence of a regular distribution of Co nanoparticles embedded in the amorphous ZrO2 matrix. Ferromagnetic correlations among the Co nanoparticules are evident in the field-cooled state. The mean particle size and width of the distribution are determined by fitting the low-field magnetic susceptibility and isothermal magnetization in the paramagnetic regime to a distribution of Langevin functions. Magnetoresistance confirms its origin from the particle magnetization and also validates information about the particle distribution.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 877: Symposium S – Magnetic Nanoparticles and Nanowires , 2005 , S6.24
Copyright
Copyright © Materials Research Society 2005

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

1. Abeles, B., Sheng, P., Coutts, M.D. and Arie, Y., Adv. Phys. 24, 407 (1975).Google Scholar
2. Batlle, X. and Labarta, A., J. Phys. D: Appl. Phys. 35, 15 (2002).Google Scholar
3. Chien, C.L., ‘Science and Technology of Nanostructured Magnetic Materials’, ed Hadjipanayis, G.C., and Prinz, G.A. (New York: Plenum Press), p. 477 (1991).Google Scholar
4. Chien, C.L., J. Appl. Phys., 6 5267 (1991).Google Scholar
5. Abeles, B., ‘Applied Solid State Science: Advances in Materials and Device Research’, ed Wolfe, R. (New York: Academic) (1976).Google Scholar
6. Chien, C.L., Xiao, J.Q., and Jiang, J.S., J. Appl. 73 5309 (1993).Google Scholar
7. Respaud, M.., et al. Phys. Rev. B 57, 2925 (1998).Google Scholar
8. Ohnuma, M., Hono, K., Abe, E., Onodera, H., Mitani, S., and Fujimori, H., J. Appl. Phys. 82, 5646 (1997).Google Scholar
9. Sankar, S., Berkowitz, A. E., and Smith, D. J., Phys. Rev. B 62, 14273 (2000); S. Sankar, D. Dender, J. A. Borchers, D. J. Smith, R. W. Erwin, S. R. Kline, and A. E. Berkowitz, J. Magn. Magn. Mater. 221, 1 (2000).Google Scholar
10. , Jamet, Depuis, V., Mélinon, P., Guiraud, G., Pérez, A., Wernsdorfer, W., Traverse, A. and Baguenard, B., Phys. Rev. B 62, 493 (2000).Google Scholar
11. Graf, H., Vancea, J., and Hoffmann, H., Appl. Phys. Lett. 80, 1264 (2002).Google Scholar
12. Hattink, B. J., Labarta, A., Muro, M. Garcia del, Batlle, X., Sánchez, F., Varela, M., Phys. Rev. B 67, 033402 (2003).Google Scholar
13. Hattink, B. J., Muro, M. García del, Konstantinović, Z., Puntes, V.F., Batlle, X., Labarta, A., Varela, M., Int. J. Nanotechnology, in press.Google Scholar
14. Sheng, P., Abeles, B., and Arie, Y., Phys. Rev. Lett. 31, 44 (1973).Google Scholar
15. Balcells, Ll., Fontcuberta, J., Martínez, B. and Obradors, X., Phys. Rev. B 58, R14697 (1998); Ll. Balcells, B. Martínez, F. Sandiumenge, and J. Fontcuberta, J. Phys.: Condens. Matter 12, 3013 (2000).Google Scholar
16. Inoue, J. and Maekawa, S., Phys. Rev. B 53, R11927 (1996).Google Scholar