Optical Investigation of La1-xCaxMnO3 and La1-xLixMnO3

Surfaces of the perovskite manganites La1-xCaxMnO3

Coherent optical and acoustic phonon generation correlated with the charge-ordering phase transition in La1−xCaxMnO3

We have observed coherent optical and acoustic phonon generation, which are strongly coupled to the charge-ordering sCOd transition in La1−xCaxMnO3 sx=0.5, 0.58d using femtosecond optical pump-probe spectroscopy. Coherent optical phonons, observed at low temperatures, disappear above the charge-ordering temperature TCO, while coherent acoustic phonons display the opposite behavior, disappearing...

Investigation of the electronic structure of the charge-ordered phase in epitaxial and polycrystalline La1−xCaxMnO3 (x=0.55,0.67) perovskite manganites

Direct Observation of Lattice Polaron Formation in the Local Structure of La1-xCaxMnO3.

S. J. L. Billinge,1 R. G. DiFrancesco,1 G. H. Kwei,2 J. J. Neumeier,3 and J. D. Thompson3 1Department of Physics and Astronomy and Center for Fundamental Materials Research, Michigan State University, East Lansing, Michigan 48824-1116 2Chemistry and Materials Sciences Department, Lawrence Livermore National Laboratory, Livermore, California 94550 3Los Alamos National Laboratory, Los Alamos, New...

Relationship between macroscopic physical properties and local distortions of low-doping La1−xCaxMnO3: An EXAFS study

A temperature-dependent extended x-ray-absorption fine structure investigation of La1−xCaxMnO3 is presented for the concentration range that spans the ferromagnetic-insulator FMI to ferromagnetic-metal FMM transition region, x=0.16, 0.18, 0.20, and 0.22; the titrated hole concentrations are slightly higher, y=0.2, 0.22, 0.24, and 0.25, respectively. For this range of Ca concentrations the sampl...