Optical study of the evolution of charge and spin ordering in the manganese perovskite Bi1-xCaxMn3 (x > 0.5)

H. L. Liu, S. L. Cooper, S. W. Cheong

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Abstract

We report an optical reflectivity study of charge and spin ordering in Bi1-xCaxMn3 (x = 0.74 and 0.82) single crystals. In the high temperature phase, T < Tco, which is characterized by ferromagnetic correlations, the low-energy contribution to the optical conductivity σ1(ω) is dominated by small polaron dynamics. For Tco < T < TN, the presence of both small polaron and charge-gap-like features signifies “phase separation” behavior in which domains of ferromagnetic and antiferromagnetic order coexist. Below TN, the polaron response is completely suppressed, and a complete charge gap develops, coincident with the onset of long-range antiferromagnetic order.

Original languageEnglish
Pages (from-to)4684-4687
Number of pages4
JournalPhysical Review Letters
Volume81
Issue number21
DOIs
Publication statusPublished - 1998 Jan 1

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Gene Conversion
Manganese
manganese
reflectance
conductivity
single crystals
Temperature
perovskite
energy

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  • Physics and Astronomy(all)

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Optical study of the evolution of charge and spin ordering in the manganese perovskite Bi1-xCaxMn3 (x > 0.5). / Liu, H. L.; Cooper, S. L.; Cheong, S. W.

In: Physical Review Letters, Vol. 81, No. 21, 01.01.1998, p. 4684-4687.

Research output: Contribution to journalArticle

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