Magnetization-dependent behaviors of interband transitions between the exchange-split bands in doped manganite films

被引：70

作者：

Moritomo, Y ^{[1
]}

Machida, A ^{[1
]}

Matsuda, K ^{[1
]}

Ichida, M ^{[1
]}

Nakamura, A ^{[1
]}

机构：

[1] NAGOYA UNIV, DEPT APPL PHYS, NAGOYA, AICHI 46401, JAPAN

来源：

PHYSICAL REVIEW B | 1997年 / 56卷 / 09期

关键词：

D O I：

10.1103/PhysRevB.56.5088

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The temperature dependence of absorption spectra for thin films of double-exchange ferromagnet R0.6Sr0.4MnO3 has been investigated with variation of the one-electron bandwidth W. With decreasing temperature, which corresponds to the increase of the magnetization M, a large amount of spectral weight transfers from the high-(similar to 3 eV) to low-(less than or equal to 1 eV) energy region. We ascribe these transitions to the interband transition between the bands split by the on-site exchange interaction J and the intraband transition within the lower band, respectively. This suggests that optical excitations in the visible region strongly couple with local spin alignments in these doped manganites.

引用

页码：5088 / 5091

页数：4