Optical and x-ray time resolved study of the structural transition in mixed valence manganites
1 Swiss Light Source, Paul Scherrer Institut, 5232 Villigen PSI, Switzerland
2 Institute for Quantum Electronics, Physics Department, ETH Zurich, 8093 Zurich, Switzerland
3 Laboratoire de Spectroscopie Ultrarapide, EPF Lausanne, 1015 Lausanne, Switzerland
4 Center for Integrated Nanotechnologies, LANL, Los Alamos, New Mexico 87545, USA
5 Rutgers Center for Emergent Materials, Rutgers University, Piscataway, NJ 08854, USA
Time resolved optical reflectivity and x-ray diffraction techniques are employed to study the laser-induced structural response in two charge and orbitally ordered manganites. Optical data indicate a non-thermal nature of the laser-triggered phase transition via the disappearance of an optical phonon related to the charge and orbitally ordered phase. The x-ray diffraction measurements on superlattice reflections confirm the non-thermal time scale of the initial step of this phase transition but also show that the complete change of structural symmetry is not instantaneous.
© Owned by the authors, published by EDP Sciences, 2013
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