Photoinduced demagnetization and its dynamical behavior in a (Nd0.5Sm0.5)0.6Sr0.4MnO3 thin film

被引：88

作者：

Matsuda, K

Machida, A

Moritomo, Y

Nakamura, A

机构：

[1] Nagoya Univ, Fac Engn, Dept Appl Phys, Chikusa Ku, Nagoya, Aichi 4648603, Japan

[2] Nagoya Univ, Ctr Integrated Res Sci & Engn, Chikusa Ku, Nagoya, Aichi 4648603, Japan

来源：

PHYSICAL REVIEW B | 1998年 / 58卷 / 08期

关键词：

D O I：

10.1103/PhysRevB.58.R4203

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have observed a significant change of absorption spectrum in the visible region by the irradiation of an intense laser pulse in a double-exchange ferromagnet (Nd0.5Sm0.5)(1-x)SrxMnO3 (x=0.4) thin film. In the ferromagnetic state, the increase of spectral weight of the interband transition between J-split bands has been observed, indicating that the photoexcited eg carriers suppress the neighboring spin correlation. The time-resolved spectroscopy in a vast time domain from 100 fs to 1 mu s has shown that the photoinduced demagnetization occurs within 200 ps after the photoinjection and spin correlation recovers in 300 ns. We further found that the demagnetization efficiency strongly depends on the spin direction of the excited e(g) carriers.

引用

收藏

页码：R4203 / R4206

页数：4

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