Ag/Ni双元素注入玻璃光吸收和磁学特性

Ag/Ni双元素注入玻璃光吸收和磁学特性 Optical Absorption and Magnetic Properties of Nanoclusters Formed by Sequential Ion Implantation Into Silica and Annealing 徐进霞 XU Jin-xia~1 1 2 3 first-author 蒋昌忠 JIANG Chang-zhong~ 1 2 3 任峰 1 2 3 付强 1 2 3 武汉大学物理科学与技术学院 武汉大学物理科学与技术学院 1,2),REN Feng~ 1,2),REN Feng~ 武汉大学物理科学与技术学院,湖北,武汉,430072 武汉大学物理科学与技术学院,湖北,武汉,430072 武汉大学电子显微镜中心 武汉大学电子显微镜中心 将MEVVA源（metal vapor vacuum arc ion source）引出的Ag,Ni离子以不同的剂量比在室温条件下注入到高纯非晶二氧化硅玻璃,透射电镜明场像以及光学吸收谱证明了该样品中形成了Ag,Ni金属纳米颗粒.样品在空气中退火,随着退火温度的升高,光学吸收谱变得平缓,当退火温度达到600℃时,Ni被部分氧化.用超导量子干涉仪（SQUID）测量样品的磁学特性,结果显示在外磁场为0 8 0 kA/m时表现为铁磁性,在外磁场为80 2 40kA/m时表现为抗磁性. In this work,we report on the formation of Ag,Ni nanoclustures obtained by sequential Ag,Ni ions implantation with different doses and rates into SiO 2 glass using a metal vapor vacuum arc（MEVVA） source.The structure and properties of nanoclusters were investigated by optical absorption spectra and transmission electron microscopy,which indicated that Ag and Ni nanoclusters have been formed.After annealing in air at different temperatures for 1 h,the absorption peaks of the samples became smooth and intensities decreased due to the evaporation of Ag and the relatively increasing of Ni content.A new absorption peak belonging to NiO appeared after the sample annealed at 600 ℃.The ferromagnetism with hysteresis loop of the sample with field 0～80 kA/m was revealed by use of superconducting quantum interference device（SQUID）. 离子注入 纳米颗粒 光吸收 超导量子干涉仪 ion implantation nanocluster optical absorption SQUID（superconducting quantum interference device） TQ171.112 国家自然科学基金资助项目（10005005,10375044）;教育部重点基金资助项目 2005-05-01 2021-04-01 5