期刊信息
- 刊名： 河北师范大学学报（自然科学版）Journal of Hebei Normal University (Natural Science)
- 主办： 河北师范大学
- ISSN： 1000-5854
- CN： 13-1061/N
- 中国科技核心期刊
- 中国期刊方阵入选期刊
- 中国高校优秀科技期刊
- 华北优秀期刊
- 河北省优秀科技期刊
溶胶-凝胶法制备Co,Ni单掺杂TiO2纳米颗粒及其室温铁磁性
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1. 青海师范大学 物理系, 青海 西宁 810008;
2. 兰州理工大学 理学院, 甘肃 兰州 730050 -
DOI：10.13763/j.cnki.jhebnu.nse.2016.01.008
Researched Room-temperature Magnetic Behavior of Co,Ni Doped TiO2 Nanoparticles Prepared by Sol-gel Method
摘要/Abstract
利用溶胶-凝胶法制备了Co,Ni单掺杂的TiO2稀磁半导体纳米颗粒,并对其微观结构、表面形貌以及磁学性能进行研究.对于3% Co,Ni掺杂TiO2样品,X线衍射和高分辨透射电镜均没发现其他相物质的生成;对于6% Co,Ni掺杂样品,X线衍射分别探测到CoTiO3和NiTiO3相的生成.通过磁学测量表明,在相同的外磁场下,随着Co,Ni掺杂浓度的增加样品的磁化强度显著增强,但6% Co,Ni掺杂导致样品中有填隙离子和顺磁性物质生成,使得纳米颗粒的剩余磁化强度和矫顽力降低.
We prepared Co,Ni doped TiO2 nanoparticles by a chemical synthesis route using sol-gel and analyze the microstructural properties,surface morphology and magnetic properties.For 3% Co,Ni doping concentration,no precipitations or other phases are detected by XRD and HRTEM.For 3% Co,Ni doped samples,CoTiO3 and NiTiO3 clusters are found by XRD.Magnetic measurement shows that,when measured at the same applied field,the magnetization increased with the increase of the Co,Ni diping concentration.When Co,Ni concentration is increased,more Co,Ni ions will occupy the interstitial sites and generate paramagnetic phases,which will decrease the remanent magnetization and coercive force.
关键词
参考文献 11
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