Two types of charge ordering in the half-doped manganites of Bi 0.5(Ca,Sr) 0.5MnO 3

Yoichi Horibe, Jai Seok Ahn, Peter A. Sharma, Shigeo Mori, Cheng Hsuan Chen, Se Jung Oh, Sang Wook Cheong

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8 Scopus citations

Abstract

From our study of the evolution of charge ordering in Bi 0.>5Ca 0.5-xSr xMnO 3(x = 0-0.5) with chemical pressure, we found the detailed nature of two distinct charge ordering schemes, associated with the structural change from Pnma- to Imma-type symmetry at × = 0.2-0.25. Charge ordering for × = 0-0.2 (Prima) is consistent with the checkerboard-type pattern, commonly observed in half-doped manganites. On the other hand, a large tolerance factor for × = 0.25-0.5 (Imma) stabilizes a double-stripe charge ordering scheme. These findings indicate the bicritical nature of two competing charge ordered states and provide further insight towards understanding the dominant charge ordering mechanism in half-doped manganites.

Original languageEnglish (US)
Article number044704
JournalJournal of the Physical Society of Japan
Volume78
Issue number4
DOIs
StatePublished - Apr 2009

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Keywords

  • Bicritical nature
  • Charge ordering
  • Half-doped manganites

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