Optical and magnetic properties of Er-doped SnO2 nanoparticles

被引：14

作者：

Bhaumik, S. ^{[1
]}

Ray, S. K. ^{[1
]}

Das, A. K. ^{[1
]}

机构：

[1] Indian Inst Technol, Dept Phys & Meteorol, Kharagpur 721302, W Bengal, India

来源：

PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE | 2013年 / 210卷 / 10期

关键词：

antiferromagnetic properties; doping; nanoparticles; photoluminescence; SnO2; sol-gel processing; ROOM-TEMPERATURE FERROMAGNETISM; PHOTOLUMINESCENCE; SEMICONDUCTOR;

D O I：

10.1002/pssa.201228786

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Er-doped SnO2 nanoparticles were synthesized with varying Er concentration by a sol-gel method. X-ray diffraction (XRD) and high-resolution transmission electron microscopic studies reveal the crystalline nature of the nanoparticles and the crystallite size decreases with the increase of Er concentration in SnO2. For higher Er concentration, the evolution of Er2O3 as a secondary phase is detected. The X-ray photoelectron spectroscopy (XPS) study depicts the existence of 4d level of Er along with a partially filled 4f state. Infrared photoluminescence (IRPL) measurement shows a strong emission peak at 1540nm due to Er doping in the SnO2 nanoparticles, which quenches after 3at% of Er concentration. Magnetic measurement reveals the antiferromagnetic (AFM) behavior of the Er-doped samples, though there is an increase in magnetic moment with increase in Er concentration. Undoped SnO2 shows a weak ferromagnetic interaction, which could be due to the presence of anionic defects (O vacancy).

引用

页码：2146 / 2152

页数：7

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