Investigation of transport and magnetic properties of SiC/Cu diluted magnetic semiconductor nano-multilayer films

被引：4

作者：

Sun, Ning ^{[1
]}

Li, Chunjing ^{[1
]}

Fu, Yuting ^{[1
]}

Li, Yanghua ^{[1
]}

Bu, Dechong ^{[1
]}

An, Yukai ^{[1
]}

Liu, Jiwen ^{[1
]}

机构：

[1] Tianjin Univ Technol, Tianjin Key Lab Photoelect Mat & Devices, Sch Mat Sci & Engn, Tianjin 300384, Peoples R China

来源：

SUPERLATTICES AND MICROSTRUCTURES | 2016年 / 97卷

基金：

中国国家自然科学基金;

关键词：

SiC/Cu nano-multilayer; DMS; Transport property; Magnetic property; PHOTOLUMINESCENCE; FERROMAGNETISM; MN; CO;

D O I：

10.1016/j.spmi.2016.06.035

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

SiC/Cu nano-multilayer films were deposited on Si substrates using radio frequency and direct current alternative sputtering technique. In this paper, the transport and magnetic properties of the films were investigated. XRR shows the SiC/Cu periodical structures of the films. XRD confirms that the 3C-SiC crystal structure is formed in the films without heating substrates. The XPS indicates that the Cu atoms substitute for Si sites of the SiC lattice and exist in a mixed valance state of Cu+ and Cu2+. The best fitting for the plots of In rho versus T-1/4 using the combination of the Mott and the band gap VRH models suggests that the carriers in the films are strongly localized. The films have a typical semiconductor characteristic and an obvious room temperature ferromagnetism which should arise from the bond magnetic polarons. The maximum values of saturation magnetization and carrier concentration are up to 15.2 emu/cm(3) and 1.86E + 22/cm(3) respectively. (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：313 / 318

页数：6

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