Antiferromagnetic interactions in Er-doped SnO2 DMS nanoparticles

作者：Sambasivam S; Joseph D Paul; Jeong Jung Hyun; Choi Byung Chun^*; Lim Kwon Taek; Kim Sang Su; Song Tae Kwon

来源：Journal of Nanoparticle Research, 2011, 13(10): 4623-4630.

DOI：10.1007/s11051-011-0426-8

• DMS
• Nanoparticles
• SnO2:Er
• ESR
• Magnetic studies
• Electron spin

Diluted magnetic semiconductor (DMS) nanoparticles of Sn1-x Er (x) O-2 (x = 0.0, 0.02, 0.04, and 0.1) were prepared by sol-gel method. The X-ray diffraction patterns showed SnO2 rutile structure for all samples with no impurity peaks. The decrease in crystallite size with Er concentration was confirmed from TEM measurements (from 12 to 4 nm). The UV-Visible absorption spectra of Er-doped SnO2 nanoparticles showed blue shift in band gap compared to undoped SnO2. The electron spin resonance analysis of Er-doped SnO2 nanoparticles indicate Er3+ in a rutile lattice and also decrease in intensity with Er concentration above x = 0.02. Temperature-dependent magnetization studies and the inverse susceptibility curves indicated increased antiferromagnetic interaction with Er concentration.

• 出版日期2011-10