PL EN


Preferences help
enabled [disable] Abstract
Number of results
2005 | 108 | 1 | 47-60
Article title

Size Effects in Radiospectroscopy Spectra of Ferroelectric Nanopowders

Content
Title variants
Languages of publication
EN
Abstracts
EN
The theoretical and experimental investigation of ferroelectric nanopowders is performed. The manifestation in radiospectroscopy spectra of size driven ferroelectric-paraelectric phase transition at some critical particle average size R = R_c was the main goal of the consideration. In theoretical part the size effect for the materials with ferroelectric tetragonal phase at room temperature and cubic paraelectric phase was considered allowing for the spontaneous polarization inhomogeneity inside a particle and distribution of particle sizes. In ESR the transformation of the spectra from tetragonal symmetry to cubic symmetry lines with decrease in nanoparticle sizes was calculated. The method of R_c value extraction from the ratio of the different symmetry lines intensities in the absorption spectra was proposed. Measurements of Fe^{3+} ESR spectra in nanopowder of BaTiO_3 were carried out at room temperature. The samples were prepared by rate-controlled method with different particle sizes, which depend on annealing temperature. The decrease in intensity of tetragonal symmetry ESR lines of Fe^{3+} and appearance of cubic symmetry line with asymmetry of the shoulders was observed with the average sizes decrease with complete disappearance of tetragonal spectrum at R ≤ 40 nm. The comparison of the theory with experiment was carried out. The theory fits experimental data pretty good. The value of critical size R_c ≈ 40 nm was extracted from ESR data. The asymmetry and broadening of right hand side shoulder of ESR cubic symmetry line was shown to be related to contribution of paramagnetic centers in the vicinity of the particles surface with lower than cubic symmetry. The deconvolution of the cubic line allowed to show that this region size is about 3 nm.
Keywords
EN
Contributors
author
  • Institute for Problems of Materials Science, NASc of Ukraine, Krjijanovskogo, 3, 03680 Kiev-142, Ukraine
author
  • Institute for Problems of Materials Science, NASc of Ukraine, Krjijanovskogo, 3, 03680 Kiev-142, Ukraine
author
  • Institute for Problems of Materials Science, NASc of Ukraine, Krjijanovskogo, 3, 03680 Kiev-142, Ukraine
author
  • Institute for Problems of Materials Science, NASc of Ukraine, Krjijanovskogo, 3, 03680 Kiev-142, Ukraine
author
  • Institute for Problems of Materials Science, NASc of Ukraine, Krjijanovskogo, 3, 03680 Kiev-142, Ukraine
author
  • Institute for Problems of Materials Science, NASc of Ukraine, Krjijanovskogo, 3, 03680 Kiev-142, Ukraine
author
  • Institute for Problems of Materials Science, NASc of Ukraine, Krjijanovskogo, 3, 03680 Kiev-142, Ukraine
References
  • 1. K. Ishikawa, T. Nomura, N. Okada, K. Tokada, Jpn. J. Appl. Phys. Part 1, 35, 5196, 1996
  • 2. J. Rychetsky, O. Hudak, J. Phys., Condens. Matter, 9, 4955, 1997
  • 3. B. Jiang, L.A. Bursill, Phys. Rev. B, 60, 9978, 1999
  • 4. M.P. McNeal, S.-J. Jang, R.E. Newnham, J. Appl. Phys., 83, 3288, 1998
  • 5. W.L. Zhong, Y.G. Wang, P.L. Zhang, B.D. Qu, Phys. Rev. B, 50, 698, 1994
  • 6. X. Li, W.-H. Shih, J. Am. Ceram. Soc., 80, 2844, 1997
  • 7. J.-C. Niepce, Electroceramics, 4, 29, 1994
  • 8. R. Bottcher, C. Klimm, H.-C. Semmelhack, G. Volkel, H.J. Glaser, E. Hartmann, Phys. Status Solidi, 215, R3, 1999
  • 9. R. Bottcher, C. Klimm, D. Michel, H.-C. Semmelhack, G. Volkel, Phys. Rev. B, 62, 2085, 2000
  • 10. M.D. Glinchuk, A.N. Morozovskaya, A.M. Slipenyuk, I.P. Bykov, Appl. Magn. Res., 24, 333, 2003
  • 11. A.V. Chadwick, J.J.F. Poplett, D.T.S. Maitland, M.E. Smith, Chem. Matter, 10, 864, 1998
  • 12. M.D. Glinchuk, A.N. Morozovskaya, Phys. Status Solidi B, 238, 81, 2003
  • 13. M.D. Glinchuk, E.A. Eliseev, V.A. Stephanovich, R. Farhi, J. Appl. Phys., 93, 1150, 2003
  • 14. M.D. Glinchuk, A.N. Morozovskaya, J. Phys., Condens. Matter, 16, 3517, 2004
  • 15. M.D. Glinchuk, P.I. Bykov, J. Phys., Condens. Matter, 16, 6779, 2004
  • 16. D.R. Tilley, in: Ferroelectric Thin Films. Finite-Size Effects on Phase Transitions in Ferroelectrics, Eds. C. Paz de Araujo, J.F. Scott, G.W. Taylor, Gordon and Breach, Amsterdam 1996, p. 11
  • 17. M.D. Glinchuk, E.A. Eliseev, V.A. Stephanovich, Physica B, 322, 356, 2002
  • 18. M.D. Glinchuk, V.G. Grachev, M.F. Deigen, A.B. Roitsin, L.A. Syslin, Electric Field Effects in Radiospectroscopy, Nauka, Moscow 1981
  • 19. M.D. Glinchuk, M.F. Deigen, Surf. Sci., 3, N3, 243, 1965
  • 20. A. Abragam, B. Bleaney, Electron Paramagnetic Resonance of Transition Ions, Clarington Press, Oxford 1970
  • 21. J. Kliava, Phys. Status Solidi B, 134, 411, 1986
  • 22. E. Sigel, K.A. Muller, Phys. Rev. B, 19, 109, 1979
Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.bwnjournal-article-appv108n105kz
JavaScript is turned off in your web browser. Turn it on to take full advantage of this site, then refresh the page.