Room-temperature ferromagnetic properties of Ni-doped ZnO rod arrays

被引：25

作者：

Xia, Chuanhui ^{[1
,2
]}

Hu, Chenguo ^{[1
]}

Tian, Yongshu ^{[1
,3
]}

Wan, Buyong ^{[1
]}

Xu, Jing ^{[1
]}

He, Xiaoshan ^{[1
]}

机构：

[1] Chongqing Univ, Dept Appl Phys, Chongqing 400044, Peoples R China

[2] Chongqing Jiaotong Univ, Coll Sci, Chongqing 400074, Peoples R China

[3] Chongqing Commun Coll, Chongqing 400035, Peoples R China

来源：

PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES | 2010年 / 42卷 / 08期

关键词：

Hydrothermal method; Optical property; Magnetic property; MAGNETIC-PROPERTIES; SPECTROSCOPY; NANOWIRES;

D O I：

10.1016/j.physe.2010.04.003

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Ni-doped ZnO rod arrays have grown on zinc foils by a hydrothermal method at 180 degrees C. The doping Ni content could be controlled by varying the reaction time. The characterization of the rod array with X-ray diffraction and X-ray photoelectron spectroscopy indicated that Ni2+ ions were incorporated into the ZnO lattices. Photoluminescence peak of the rod arrays shifts to a little longer wavelength and its intensity decreases with the increase in Ni content. The green light emission as a result of oxygen vacancies was observed when excessive Ni ions were doped in ZnO. The rod arrays have exhibited room-temperature ferromagnetic behavior with the remanence of 0.454, 0.605 and 0.526 emu/cm(3) for the Ni concentration of 2.38, 4.35 and 5.54 at%, respectively. The exchange interaction between local spin-polarized electrons and conductive electrons was proposed as a cause of the room-temperature ferromagnetism. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：2086 / 2090

页数：5

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