Optical and magnetic properties of Sn1-xMnxO2 dilute magnetic semiconductor nanoparticles

被引：21

作者：

Ahmad, Tokeer ^{[1
]}

Khatoon, Sarvari ^{[1
]}

Coolahan, Kelsey ^{[2
]}

机构：

[1] Jamia Millia Islamia, Dept Chem, Nanochem Lab, New Delhi 110025, India

[2] Rowan Univ, Dept Phys & Astron, Glassboro, NJ 08028 USA

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2014年 / 615卷

关键词：

Dilute magnetic semiconductors; Nanoparticles; Solvothermal synthesis; Optical properties; Electron microscopy; Magnetic measurements; STRUCTURAL-CHARACTERIZATION; SOLVOTHERMAL SYNTHESIS; SOLID-SOLUTIONS; THIN-FILMS; SNO2; FERROMAGNETISM; SPECTRA;

D O I：

10.1016/j.jallcom.2014.06.161

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：

Sn1-xMnxO2 (x = 0.05, 0.10 and 0.15) nanoparticles with tetragonal structure have been successfully synthesized by solvothermal method using oxalate precursor route. The oxalate precursors and its corresponding oxides were characterized by powder X-ray diffraction (PXRD), thermogravimetric (TG), fourier transform infrared (FTIR) and transmission electron microscopic (TEM) studies. PXRD studies showed the highly crystalline and monophasic nature of the solid solutions. The shifting of X-ray reflections towards higher angle is attributed to the incorporation of Mn2+ ions in SnO2 host lattice. The average particle size was found to be in the range of 5-11 nm. Reflectance measurements showed blue shift in energy band gap which increases with increasing Mn2+ concentration. Surface area of these nanoparticles (59-388 m(2)/g) was found to be high which increases with increasing the dopant ion concentration. Mn-doped SnO2 showed distinct magnetic behaviour with different manganese concentration. Sn1-xMnxO2 (x = 0.05 and 0.10) revealed the parasitic ferromagnetism, however on increasing x = 0.15, sample showed paramagnetic behaviour. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：263 / 269

页数：7

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