原子与分子物理学报2009，Vol.26Issue(5)：848-852,5.DOI:10.3969/j.issn.1000-0364.2009.05.014
CdS:Mn/SiO_2复合纳米颗粒的反常的磁学特性
Anomalous magnetic behaviour of CdS:Mn/SiO_2 nanocomposites
摘要
Abstract
Silica-overcoated CdS nanocrystals doped with Mn~(2+) ions were synthesized by a reverse-micelle method. Structural characterization of the nanoparticles was carried out with high resolution transmission electron microscopy (HRTEM) and the electron paramagnetic resonance (EPR) and their magnetic properties were measured by superconducting quantum interference device (SQUID) magnetometry at lower temperature. The result of measurement indicates that as-synthesized nanocrystals dispersed in a silica matrix exhibit obvious shift of the hysteresis loop toward the field direction, however, the nanocrystals coated with compact SiO_2 shell display symmetric hysteresis loop. The reasonable explanations are presented for the unusual phenomenon during magnetization process.关键词
纳米晶/CdS/Mn~(2+)/SiO_2/磁学特性/磁滞回线Key words
nanocrystals/ CdS:Mn~(2+)/SiO_2/ magnetic properties/ hysteresis loop分类
数理科学引用本文复制引用
赵普琴,薛洪涛..CdS:Mn/SiO_2复合纳米颗粒的反常的磁学特性[J].原子与分子物理学报,2009,26(5):848-852,5.基金项目
南京邮电大学青蓝计划(NY207097) （NY207097）
