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Your search keyword '"Blasco, Javier"' showing total 4 results
Start Over Author "Blasco, Javier" Journal physical review letters
4 results on '"Blasco, Javier"'

4. Incommensurate Sinusoidal Oxygen Modulations in Layered Manganites La1-xSr1+xMnO4 (x ≥ 0.5).

Author

Garcia, Joaquín, Herrero-Martín, Javier, Subías, Gloria, Blasco, Javier, Andreu, J. S., and Sánchez, M. Concepción

Subjects
*OXYGEN, *PHASE transitions, *LANTHANUM compounds, *X-ray diffraction, *OPTICAL polarization, *SCATTERING (Physics), *CHARGE density waves, *SUPERLATTICES
Abstract

We have studied the incommensurate-ordered phase in overdoped La0.4Sr1.6MnO4 by resonant x-ray diffraction at the Mn K edge. Weak resonant superlattice (h ± 0.2 h ± 0.2 0) and (h ± 0.4 h ± 0.4 0) reflections of the tetragonal structure were found below -240 K. The energy, azimuth angle, and polarization dependencies of the resonant scattering have revealed sinusoidal modulations of the oxygen motions that are transverse and longitudinal to the tetragonal [110] direction. This result discards (Mn3+, Mn4+)-like stripe-type order but point to a charge-density-modulation picture. [ABSTRACT FROM AUTHOR]

Published
2012
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