Common features of nanoscale structural correlations in magnetoresistive manganites with a ferromagnetic low-temperature state

V. Kiryukhin, T. Y. Koo, A. Borissov, Y. J. Kim, C. S. Nelson, J. P. Hill, D. Gibbs, S. W. Cheong

Research output: Contribution to journalArticlepeer-review

Abstract

We report x-ray scattering studies of nanoscale structural correlations in (formula presented) and (formula presented) (formula presented) We find that the correlated regions possess a temperature-independent correlation length of 2-3 lattice constants which is the same in all samples. The period of the lattice modulation of the correlated regions is proportional to the Ca/Sr doping concentration x. Remarkably, the lattice modulation periods of these and several other manganites with a ferromagnetic ground state fall on the same curve when plotted as a function of x. Thus, the structure of the correlated regions in these materials appears to be determined by a single parameter x. We argue that these observations provide important clues for understanding the colossal magnetoresistance phenomenon in manganites.

Original languageEnglish (US)
Pages (from-to)1-5
Number of pages5
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume65
Issue number9
DOIs
StatePublished - 2002

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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