Structural and magnetic properties of Zn1-xMnxO (0≤x≤0.40) nanoparticles

被引：33
作者：
Duan, L. B. [1 ]
Rao, G. H.
Yu, J.
Wang, Y. C.
Chu, W. G.
Zhang, L. N.
机构：
[1] Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100080, Peoples R China
[2] Natl Ctr Nanosci & Technol China, Beijing 100080, Peoples R China
[3] Tsinghua Univ, Tsinghua Foxconn Nanotechnol Res Ctr, Beijing 100084, Peoples R China
[4] Tsinghua Univ, Dept Phys, Beijing 100084, Peoples R China
来源：
JOURNAL OF APPLIED PHYSICS | 2007年 / 102卷 / 10期
基金：
中国国家自然科学基金;
关键词：
D O I：
10.1063/1.2815647
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Zn1-xMnxO nanoparticles synthesized by a combustion method with Mn concentration x up to 0.40 are carefully characterized by means of x-ray powder diffraction and high resolution transmission electron microscopy. Single-phase solid solution Zn1-xMnxO is achieved with a solubility limit of similar to 30 at. % Mn. An almost linear dependence of lattice constant on the Mn content is observed, indicating the homogeneous substitution of Mn2+ for the Zn2+ in wurtzite ZnO. Magnetization at T=5 K and H=5 T exhibits a maximum around the Mn doping concentration of x(m)=0.125. Room temperature ferromagnetism with low coercive field (H-c similar to 70 +/- 5 Oe) is obtained for the sample with x=0.01. The observed magnetic properties of Zn1-xMnxO can be well understood within the framework of the donor impurity band exchange model. (c) 2007 American Institute of Physics.
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页数：6
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