碳掺杂二氧化钛的稀磁特性

Magnetic Properties of Carbon Doped TiO_2 Nanoparticles

作为新型材料的稀磁半导体(DMS)在大规模集成电路、高频率器件和光电子器件等方面得到广泛的运用.这主要源于稀磁半导体(DMS)同时具备半导体的电学性质和磁性材料的磁学性质.采用放电等离子烧结(SPS)制备了碳纳米管掺杂的锐钛矿相二氧化钛和未掺杂锐钛矿相二氧化钛样品,样品的结构、形貌、成分、氧空位和磁性等物理性质分别通过XRD,TEM,Raman,XPS,PL,VSM等表征手段进行了分析.综合实验结果,发现氧空位的存在和室温铁磁性正相关.

Diluted magnetic semiconductor （DMS） is a new functional semiconductor and magnetic material with the elec- tronic properties and magnetic properties having the application prospects in large scale integrated circuit high frequency device and optoelectronic device. We prepared C doped anatase TiO2 and pure anatase TiO2nanopartieles by spark plasma sintering （SPS）. The X-ray diffraction（XRD）, transmission electron microscopy（TEM）, Raman analysis and X-ray photoelectron spec- troscopy（XPS）, the photoluminescence（PL） and vibrating sample magnetometer（VSM） were used to analyze the structure, morphology, element, oxygen vacancy and magnetic properties of nanoparticles. According to the results of the analyses, we found that the room-temperature ferromagnetism of C doped TiO2 and pure TiO2 nanoparticles were sensitive related to oxygen vacancies.