Photoinduced Spin Fluctuation in a Ferromagnetic Manganite Film

被引：0
|
作者：
Liu, Xiaojun [1 ]
机构：
[1] Nanjing Univ, Dept Elect Sci & Engn, Nanjing 210093, Peoples R China
来源：
SPIN PHYSICS | 2009年 / 1149卷
关键词：
Spin fluctuation; Photoinduced effect; Manganite film; RESISTIVITY;
D O I：
暂无
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The transmission and resistance in a La0.6Sr0.4MnO3 film (Tc similar to 325 K) have been investigated under photo-irradiation at various temperatures by means of time-resolved pump-probe method. Below Tc, we have observed a negative transient transmission change Delta T/T at 2.54 eV as well as a positive resistance change Delta R/R under photo-irradiation at excited energy E-exc = 3.20 eV. With increasing the temperature to Tc, the Delta T/T shows a significantly reduction. We have further found that the photoinduced Delta R/R is suppressed with increase of the applied dc current I at 295 K. We have ascribed the photoinduced Delta T/T and Delta R/R of the La0.6Sr0.4MnO3 film to the spin fluctuation in the ferromagnetic phase.
引用
收藏
页码：915 / 918
页数：4
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