Relationship between charge stripe order and structural phase transitions in La{sub 1.875}Ba{sub 0.125-x}Sr{sub x}CuO{sub 4}

Journal Article · Fri Oct 01 00:00:00 EDT 2004 · Physical Review. B, Condensed Matter and Materials Physics

DOI:https://doi.org/10.1103/PhysRevB.70.134512· OSTI ID:20664907

Kimura, H; Noda, Y ^[1]; Goka, H; Fujita, M; Yamada, K ^[2]; Mizumaki, M; Ikeda, N; Ohsumi, H ^[3]

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1. Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577 (Japan)
2. Institute for Materials Research, Tohoku University, Sendai 980-8577 (Japan)
3. Japan Synchrotron Radiation Research Institute, Hyogo 679-5198 (Japan)

The nature of charge stripe order and its relationship with structural phase transitions were studied using synchrotron x-ray diffraction in La{sub 1.875}Ba{sub 0.125-x}Sr{sub x}CuO{sub 4} (0.05{<=}x{<=}0.10). For x=0.05, as temperature increased, incommensurate superlattice peaks associated with the charge order disappeared just at the structural phase transition temperature, T{sub d2}. However, for x=0.075 and 0.09, the superlattice peaks still existed as a short range correlation even above T{sub d2}, indicating a precursor of charge ordering. Furthermore, temperature dependences of the superlattice peak intensity, correlation length, and incommensurability for x=0.05 are different from those for x=0.075 and 0.09. These results suggest that the transition process into the charge stripe order strongly correlates with the order of the structural phase transitions. A quantitative comparison of the structure factor associated with the charge order have been also made for all the samples.

• OSTI ID: 20664907
• Journal Information: Physical Review. B, Condensed Matter and Materials Physics, Journal Name: Physical Review. B, Condensed Matter and Materials Physics Journal Issue: 13 Vol. 70; ISSN 1098-0121
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BARIUM COMPOUNDS
CRYSTAL STRUCTURE
CUPRATES
HIGH-TC SUPERCONDUCTORS
LANTHANUM COMPOUNDS
PHASE TRANSFORMATIONS
STRONTIUM COMPOUNDS
STRUCTURE FACTORS
SUPERLATTICES
SYNCHROTRONS
TEMPERATURE DEPENDENCE
TRANSITION TEMPERATURE
X-RAY DIFFRACTION