Article ID Journal Published Year Pages File Type
1814301 Physica B: Condensed Matter 2008 7 Pages PDF
Abstract

Infrared-active phonons in LaMnO3+δLaMnO3+δ were studied by means of the reflection and transmission spectroscopy from 50 to 800cm-1 at room temperature. Powder and ceramic samples of the phases of Pnma-2(δ=0.02),Pnma-1(δ=0.08) and R3¯c(δ=0.15) were investigated. In addition, energies of the dipole-active phonons in Pnma-2, Pnma-1 phases were obtained by lattice-dynamics calculations. The transformations of IR-active phonons with the increase in δδ in the sequence of Pnma-2, Pnma-1, R3¯c are discussed.

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Physical Sciences and Engineering Physics and Astronomy Condensed Matter Physics
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IR-active optical phonons in Pnma-1, Pnma-2 and R3¯c phases of LaMnO3+δLaMnO3+δ
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