Optical evidence of multiphase coexistence in single crystalline (La, Pr, Ca)MnO3

H. J. Lee, K. H. Kim, M. W. Kim, T. W. Noh, B. G. Kim, T. Y. Koo, S. W. Cheong, Y. J. Wang, X. Wei

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Abstract

We investigated temperature (T)- and magnetic field-dependent optical conductivity spectra σ(ω) of a La5/8-yPryCa3/8MnO3(y≈0.35) single crystal, showing intriguing phase coexistence at low T. At Tc<T <TCO, a dominant charge-ordered phase produces a large optical gap energy of ∼0.4 eV. At T<Tc, at least two absorption bands newly emerge below 0.4 eV. Analyses of σ(ω) indicate that the bands should be attributed to a ferromagnetic metallic phase and a charge-disordered phase that coexist with the charge-ordered phase. This optical study clearly shows that La5/8-yPryCa3/8MnO3(Y≈0.35) is composed of multiphases that might have different lattice strains.

Original languageEnglish (US)
Article number115118
Pages (from-to)1151181-1151186
Number of pages6
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume65
Issue number11
StatePublished - Mar 15 2002

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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