Zeitschrift für Physik B Condensed Matter

, Volume 104, Issue 4, pp 699–702

From manganites to cuprates: a comparative study of the local lattice instability

Authors

  • A. Lanzara
    • Dipartimento di FisicaUniversità di Roma “La Sapienza”
  • N.L. Saini
    • Dipartimento di FisicaUniversità di Roma “La Sapienza”
  • M. Brunelli
    • Dipartimento di FisicaUniversità di Roma “La Sapienza”
  • F. Natali
    • Dipartimento di FisicaUniversità di Roma “La Sapienza”
  • A. Bianconi
    • Dipartimento di FisicaUniversità di Roma “La Sapienza”
  • P.G. Radaelli
    • Institut Max Von Laue-Paul Langevin
Article

DOI: 10.1007/s002570050511

Cite this article as:
Lanzara, A., Saini, N., Brunelli, M. et al. Zeitschrift für Physik B Condensed Matter (1997) 104: 699. doi:10.1007/s002570050511

Abstract

Recent studies have shown that structural instabilities play a vital role in segregation of charge carriers in the perovskites. We have used extended x-ray absorption fine structure (EXAFS) to investigate the instability of the CuO6 octahedra of the La1:85Sr0:15CuO4 (LSCO) system showing high Tc superconductivity and the MnO6 octhahedra of the La0:75Ca0:25MnO3 (LCMO) system showing GMR (giant-magneto resistance) properties. Temperature dependent Cu K-edge EXAFS spectra on the LSCO and Mn K-edge on the LCMO systems are reported. The results show a similarity in the lattice instability of the two systems providing evidence for a similar phase segregation of localized and itinerant charge carriers in the two families of perovskite systems.

PACS

74.72.Dn 71.38.+i 61.10.Ht

Copyright information

© Springer-Verlag 1997