Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10653240 | Solid State Communications | 2005 | 5 Pages |
Abstract
Photoinduced effects in a single crystal of bilayered manganites, La2â2xSr1+2xMn2O7 (x=0.38), were investigated in a wide range of temperatures by pump-probe measurement at a photon energy of 1.6Â eV. In a ferromagnetic metallic state, significant enhancement of positive rise in differential reflectivity with a slow relaxing time of 100Â ps was observed just below TC=127Â K, indicating that the reflectivity change with the slow relaxation time constant is induced by laser heating. We have also observed an unconventional fast relaxing component that has a time constant of the order of 10Â ps. This fast relaxing component, whose absolute value has an asymmetric peak at TC, is presumably due to short-range correlation of Jahn-Teller distortion.
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Physical Sciences and Engineering
Materials Science
Materials Science (General)
Authors
Y. Hirobe, Y. Kubo, K. Kouyama, H. Kunugita, K. Ema, H. Kuwahara,