Dependence of magnetism on the doping level of Zn1-xMnxTe nanoparticles synthesized by a hydrothermal method

被引：12

作者：

Tang, F. L. ^{[1
,2
]}

Su, H. L. ^{[1
,2
]}

Chuang, P. Y. ^{[3
]}

Wu, Y. C. ^{[1
,2
]}

Huang, J. C. A. ^{[3
,4
,5
]}

Huang, X. L. ^{[6
]}

Jin, Y. ^{[6
]}

机构：

[1] Hefei Univ Technol, Sch Mat Sci & Engn, Hefei 230009, Peoples R China

[2] Hefei Univ Technol, Anhui Prov Key Lab Adv Funct Mat & Devices, Hefei 230009, Peoples R China

[3] Natl Cheng Kung Univ, Dept Phys, Tainan 701, Taiwan

[4] Natl Cheng Kung Univ, Adv Optoelect Technol Ctr, Tainan 701, Taiwan

[5] Natl Cheng Kung Univ, Ctr Micro Nano Sci & Technol, Tainan 701, Taiwan

[6] Samsung Adv Inst Technol, Beijing 100128, Peoples R China

来源：

RSC ADVANCES | 2014年 / 4卷 / 90期

基金：

中国国家自然科学基金;

关键词：

SEMICONDUCTORS; FERROMAGNETISM; SPINTRONICS; ELECTRONICS; FUTURE; MNO;

D O I：

10.1039/c4ra08520e

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Mn-doped ZnTe nanoparticles with various degrees of Mn-doping from 3 at.% to 18 at.% were synthesized by a hydrothermal method. A single-phase zinc-blende-structured sample was obtained only at the Mn-doping level of 3 at.%, while the impurity phase of MnO was present in the samples with higher degrees of Mn-doping. In all of the samples, the Mn valence states were lower than 2+. All samples exhibited both ferromagnetism and paramagnetism. The ferromagnetism is mainly attributable to the overlapping of the bound magnetic polarons and the paramagnetism is mainly caused by the isolated polarons and Mn ions. Samples that were doped with 3 at.% and 6 at.% Mn also exhibited superparamagnetism and antiferromagnetism. The superparamagnetism may have arisen from the presence of some tiny ferromagnetic nanoparticles. The antiferromagnetism is believed to have arisen mainly from the carrier-mediated interaction among Mn ions.

引用

页码：49308 / 49314

页数：7

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