Versatile and competing spin-charge-orbital orders in the bilayered manganite system Pr (Sr1-y Cay) 2 Mn2 O7

Y. Tokunaga, T. J. Sato, M. Uchida, R. Kumai, Y. Matsui, T. Arima, Y. Tokura

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17 Citations (Scopus)

Abstract

Electronic-phase competition has been investigated for single crystals of half-doped bilayer-structure manganites, Pr (Sr1-y Cay) 2 Mn2 O7 (0≤y≤1.0), with controlled one-electron bandwidth (W). For y≤0.4, the A-type antiferromagnetic (AF) state with x2 - y2 orbital order shows up as the ground state while accompanying the short-range vertical charge order with the periodicity of ≈4 a0 (a0 ≈0.4 nm). For y>0.4, with reduced W, the CE-type AF state emerges with the ordered staggered orbitals (3 x2 - r2 3 y2 - r2) whose diagonal stripes undergo the 90° rotation with decreasing temperature, perhaps coupled with the evolution of spin correlation.

Original languageEnglish
Article number064428
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume77
Issue number6
DOIs
Publication statusPublished - 2008 Feb 25
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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