| Original Articles |
|
|
|
|
Photoinduced Charge-Ordering Fluctuation in Wide-Bandwidth La0.7Sr0.3MnO3 Films |
| WU Da-Jian;WU Xue-Wei;LIU Xiao-Jun |
| Key Laboratory of Modern Acoustics and Department of Electronic Science and Engineering, Nanjing University, Nanjing 210093 |
|
| Cite this article: |
|
WU Da-Jian, WU Xue-Wei, LIU Xiao-Jun 2006 Chin. Phys. Lett. 23 1903-1906 |
|
|
|
Abstract Photoinduced effects on the transmission and resistivity in wide-bandwidth manganite La0.7Sr0.3MnO3 films (TC= 350K) have been investigated at various temperatures in the range of 5--470K by means of the time-resolved pump--probe method. Below TC, we have observed a negative transmission change ΔTM/TM at 2.54eV and a positive resistivity change Delta R/R under photo-irradiation at excited energy Eexc = 3.20eV. With temperature approaching to TC, the values of ΔTM/TM and ΔR/R show a significant reduction. We have ascribed the photoinduced changes on the transmission and resistivity of the La0.7Sr0.3MnO3 film to the charge-ordering fluctuation in the ferromagnetic phase, which is similar to that observed in the narrow-bandwidth La0.7Ca0.3MnO3 films.
|
| Keywords:
75.47.Lx
75.90.+w
75.47.-m
|
|
|
Published: 01 July 2006
|
|
| PACS: |
75.47.Lx
|
(Magnetic oxides)
|
| |
75.90.+w
|
(Other topics in magnetic properties and materials)
|
| |
75.47.-m
|
(Magnetotransport phenomena; materials for magnetotransport)
|
|
|
|
|
|
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
