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Structure and Magnetism of Co-implanted TiO2
Bin-feng Ding*
Author NameAffiliationE-mail
Bin-feng Ding* Department of Physics and Electronic Information, Langfang Teachers College, Langfang 065000, China ding binfeng@126.com 
Abstract:
Crystalline Co nanocomposites in the rutile TiO2 were synthesized by 180 keV Co ion beam implantation at temperature of 623 K with the fluence of 4×1016 cm-2. The structural and magnetic properties of samples with different thermal treatment were characterized by synchrotron radiation X-ray diffraction (SR-XRD), high resolution transmission electron mi-croscopy (HRTEM), Rutherford backscattering/channeling and the superconducting quan-tum interference device magnetometer. The SR-XRD results reveal the formation of hcp and fcc phases of Co clusters, and the SR-XRD and HRTEM show that Co nanocrystals (NCs) have been formed in TiO2 after ion implantation. With increasing of annealing tem-perature, the transition of hcp to fcc Co is observed, and the Co NCs sizes were increased with increasing post-annealing temperature. At annealing temperature 1073 K, the lattice damaged is significantly removed compared with the virgin sample. The Co NCs forming inside TiO2 are the major contribution of the measured ferromagnetism.
Key words:  Nanocomposite, Ferromagnetic material, Ion implantation
FundProject:
在不同的退火温度下钴注入二氧化钛结构与磁性
丁斌峰*
摘要:
选用能量为180 keV,温度为623 K,注入4×1016 cm-2剂量的钴离子束注入TiO2样品.在不同的退火温度下,用高分辨的扫描电镜、同步辐射X射线衍射、卢瑟福背散射/沟道实验和超导量子干涉仪,分别对样品进行结构与磁性的测试. SR-XRD和HRTEM测试结果表明: 在Co注入TiO2后,形成了钴的体心立方(hcp)相和面心立方(fcc)相,且在TiO2中,钴-纳米粒子也已经形成. 随着退
关键词:  纳米物质,磁性材料,离子注入
DOI:10.1088/1674-0068/24/06/724-728
分类号: