Characterization of transparent superconductivity Fe-doped CuCrO2 delafossite oxide

被引：41

作者：

Taddee, Chutirat ^{[1
]}

Kamwanna, Teerasak ^{[2
,3
,4
]}

Amornkitbamrung, Vittaya ^{[2
,3
,4
]}

机构：

[1] Khon Kaen Univ, Fac Sci, Mat Sci & Nanotechnol Program, Khon Kaen 40002, Thailand

[2] Khon Kaen Univ, Fac Sci, Dept Phys, Khon Kaen 40002, Thailand

[3] Nanotec KKU Ctr Excellence Adv Nanomat Energy Pro, Khon Kaen 40002, Thailand

[4] Khon Kaen Univ, INRC, Khon Kaen 40002, Thailand

来源：

APPLIED SURFACE SCIENCE | 2016年 / 380卷

关键词：

Transparent conducting oxides; Delafossite; CuCrO2; Magnetic properties; Superconductivity; PHYSICAL-PROPERTIES; ELECTRICAL-CONDUCTION; OPTICAL-PROPERTIES; THIN-FILMS; DEPOSITION; CUALO2;

D O I：

10.1016/j.apsusc.2016.01.120

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Delafossite CuCr1-xFexO2 (0.0 <= x <= 0.15) semiconductors were synthesized using a self-combustion urea nitrate process. The effects of Fe concentration on its microstructural, optical, magnetic, and electrical properties were investigated. X-ray diffraction (XRD) analysis results revealed the delafossite structure in all the samples. The lattice spacing of CuCr1-xFexO2 slightly increased with increasing substitution of Fe at the Cr sites. The optical properties measured at room temperature using UV-visible spectroscopy showed a weak absorbability in the visible light and near IR regions. The corresponding direct optical band gap was about 3.61 eV, exhibiting transparency in the visible region. The magnetic hysteresis loop measurements showed that the Fe-doped CuCrO2 samples exhibited ferromagnetic behavior at room temperature. This indicated that the substitution of Fe3+ for Cr3+ produced a mixed effect on the magnetic properties of CuCrO2 delafossite oxide. The temperature dependent resistivity measurements clearly revealed the presence of superconductivity in the CuCr1-xFexO2 with a superconducting transition up to 118 K. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：237 / 242

页数：6

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