Optical and electronic properties of one-dimensional Ca3Co2O6 thin films: Influence of the oxygen pressure

被引：25

作者：

Moubah, R. ^{[1
]}

Colis, S. ^{[1
]}

Schmerber, G. ^{[1
]}

Petersen, J. ^{[2
]}

Dinia, A. ^{[1
]}

机构：

[1] IPCMS, UMR 7504, UDS CNRS, UDS ECPM, F-67034 Strasbourg 2, France

[2] Ctr Rech Publ Henri Tudor, Lab Technol Ind, L-4002 Esch Sur Alzette, Luxembourg

来源：

APPLIED PHYSICS LETTERS | 2009年 / 94卷 / 14期

关键词：

calcium compounds; energy gap; pulsed laser deposition; sapphire; thin films; ultraviolet spectra; visible spectra; X-ray photoelectron spectra; MAGNETIC-PROPERTIES; SINGLE-CRYSTAL; COMPOUND;

D O I：

10.1063/1.3114373

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Thin films of Ca3Co2O6 were fabricated on c-cut sapphire substrates by pulsed laser deposition. The films are polycrystalline and can be grown in a large interval of oxygen pressure with significant influence on the film texture. X-ray photoelectron spectroscopy analyses indicated that only Co3+ ions are present in our samples for both octahedral and trigonal prismatic sites. The band gap measured by ultraviolet-visible light absorption experiments was found about 1.35 eV and slightly larger when the oxygen partial pressure during the deposition is increased from 10(-3) to 7x10(-2) mbar. Temperature dependent transport measurements showed a semiconducting behavior of the films and the associated band gap was found similar to the one evaluated by optical measurements and reported by theoretical studies.

引用

页数：3

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