Infrared studies of a La0.67Ca0.33MnO3 single crystal:: Optical magnetoconductivity in a half-metallic ferromagnet

被引：58
作者：
Boris, AV [1 ]
Kovaleva, NN
Bazhenov, AV
van Bentum, PJM
Rasing, T
Cheong, SW
Samoilov, AV
Yeh, NC
机构：
[1] Chernogolovka Solid State Phys Inst, Chernogolovka 142432, Moscow District, Russia
[2] Catholic Univ Nijmegen, Mat Res Inst, NL-6525 ED Nijmegen, Netherlands
[3] Catholic Univ Nijmegen, High Field Magnet Lab, NL-6525 ED Nijmegen, Netherlands
[4] Lucent Technol, Bell Labs, Murray Hill, NJ 07974 USA
[5] Rutgers State Univ, Dept Phys & Astron, Piscataway, NJ 08855 USA
[6] CALTECH, Dept Phys, Pasadena, CA 91125 USA
来源：
PHYSICAL REVIEW B | 1999年 / 59卷 / 02期
关键词：
D O I：
10.1103/PhysRevB.59.R697
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The infrared reflectivity of a La0.67Ca0.33MnO3 single crystal is studied over a broad range of temperatures (78-340 K), magnetic fields (0-16 T), and wave numbers (20-9000 cm(-1)). The optical conductivity gradually changes from a Drude-like behavior to a broad peak feature near 5000 cm(-1) in the ferromagnetic state below the Curie temperature T-C= 307 K. Various features of the optical conductivity bear striking resemblance to recent theoretical predictions based on the interplay between the double exchange interaction and the Jahn-Teller electron-phonon coupling. A large optical magnetoconductivity is observed near T-C. [S0163-1829(99)50602-4].
引用
收藏
页码：R697 / R700
页数：4
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