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The ultrafast buildup of optically induced stress in ferromagnetic nanolayers of a SrRuO3/SrTiO3 superlattice is analyzed by femtosecond x-ray diffraction. Below the Curie temperature, magnetoelastic contractive stress reduces the expansive anharmonic phonon stress.
The ultrafast buildup of optically induced stress in ferromagnetic nanolayers of a SrRuO3/SrTiO3 superlattice is analyzed by femtosecond X-ray diffraction. Below the Curie temperature, magnetoelastic contractive stress reduces the expansive anharmonic phonon stress.
Propagating strain waves in SrTiO3 with amplitudes of Deltaa(t)/a0 ap 10-4 launched from a PbZr0.2Ti0.8O3 film are measured by X-ray diffraction. The shape of the picosecond transients depends nonlinearly on the strain amplitude due to X-ray interference.
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