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 language | English |
|---|---|
| Article number | 064428 |
| Journal | Physical Review B - Condensed Matter and Materials Physics |
| Volume | 77 |
| Issue number | 6 |
| DOIs | |
| Publication status | Published - 2008 Feb 25 |
| Externally published | Yes |
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
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Tokunaga, Y., Sato, T. J., Uchida, M., Kumai, R., Matsui, Y., Arima, T., & Tokura, Y. (2008). Versatile and competing spin-charge-orbital orders in the bilayered manganite system Pr (Sr1-y Cay) 2 Mn2 O7. Physical Review B - Condensed Matter and Materials Physics, 77(6), [064428]. https://doi.org/10.1103/PhysRevB.77.064428