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

被引：59

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

页码：R697 / R700

页数：4

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