Effect of Surfactant Treatment on the Magnetic Properties of Mn-Doped ZnO Bulk and Nanoparticles

被引：36
|
作者：
Jayakumar, O. D. [1 ]
Sudakar, C. [2 ]
Vinu, A. [3 ]
Asthana, A. [4 ]
Tyagi, A. K. [1 ]
机构：
[1] Bhabha Atom Res Ctr, Div Chem, Bombay 400085, Maharashtra, India
[2] Wayne State Univ, Dept Phys & Astron, Detroit, MI 48201 USA
[3] Natl Inst Mat Sci, Int CtrMat Nanoarchitecton, World Premier Int Res Ctr Initiat Mat Nanoarchite, Tsukuba, Ibaraki 3050044, Japan
[4] Natl Inst Mat Sci, Adv Elect Microscopy Grp, Tsukuba, Ibaraki 3050044, Japan
来源：
JOURNAL OF PHYSICAL CHEMISTRY C | 2009年 / 113卷 / 12期
关键词：
ROOM-TEMPERATURE FERROMAGNETISM; THIN-FILMS; SINGLE-CRYSTALS; NANOCRYSTALS; SEMICONDUCTORS; GROWTH; OXIDES; TIO2;
D O I：
10.1021/jp809288s
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：
We report the effect of surfactant treatment on the structural and magnetic properties of Mn-doped ZnO bulk (Zn0.978Mn0.022O) and Mn- and Li-codoped ZnO nanoparticles (Zn0.96Mn0.03Li0.01O) prepared by low-temperature reaction. X-ray diffraction and transmission electron microscopy analyses of these samples showed the formation of impurity-free crystals with wurtzite ZnO structure. XPS data revealed that Mn exists in the 2+ oxidation state. TEM and HRTEM studies of sodium bis-2-ethylhexyl sulfosuccinate (AOT)-treated Zn0.978Mn0.022O showed predominantly rodlike microstructures developing into platelets and sizes in the range of 50-500 nm, whereas the AOT-treated Zn0.96Mn0.03Li0.01O sample showed nearly spherical particles in the nanometer regime (20-30 nm). DC magnetization measurements as a function of field showed enhanced room temperature ferromagnetism for the surfactant-treated Zn0.978Mn0.022O and Zn0.96Mn0.03Li0.01O. We discuss the possible role of surfactant and Li ion on the magnetic properties of Mn-doped ZnO.
引用
收藏
页码：4814 / 4819
页数：6
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