2002/03/05 by H. J. Lee, K. H. Kim, Kee Hoon Kim +9 · 2 citations
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Magnetic and transport properties of perovskites and related materials #Multiferroics and related materials #cond-mat.str-el
paper · pdf · doi:10.1103/physrevb.65.115118
published as Phys. Rev. B 65, 115118 (2002). · A single file with 9 figures embedded, to appear in Phys. Rev. B
arxiv created 2002/03/05 · openalex publication_date 2002/03/08 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We investigated temperature (T)- and magnetic field-dependent optical conductivity spectra \ensuremathσ(\ensuremathω) of a La_5/8\ensuremath-yPryCa3/8MnO3(y\ensuremath≈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 \ensuremath∼0.4 eV. At T<TC, at least two absorption bands newly emerge below 0.4 eV. Analyses of \ensuremathσ(\ensuremathω) 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 La_5/8\ensuremath-yPryCa3/8MnO3(y\ensuremath≈0.35) is composed of multiphases that might have different lattice strains.