Study on the Preparation and Room-Temperature Ferromagnetic of Binary Manganese-Vanadium Oxide Thin Films
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摘要: 本工作采用磁控溅射技术在蓝宝石衬底上制备了钒氧化物(VOx)磁性薄膜,研究了共沉积Mn元素对VOx表面形貌及铁磁性的影响。结构与形貌表征结果表明:本文制备的VOx薄膜是一种化学计量比在V2O3与VO2之间的纯相钒氧化物薄膜,Mn元素的引入使VOx晶格发生轻微畸变,并且导致VOx的形貌由纳米棒状结构演化为球状;磁学性能结果表明:VOx薄膜呈现出室温铁磁性,随着Mn元素含量的增加,薄膜的饱和磁矩先增大后减小,Mn元素与V元素比例为1∶1时,表面形貌最规则且具有最大饱和磁矩345 emu/cm3。Abstract: In this work, magnetic vanadium oxide(VOx) thin films were prepared on sapphire substrates by RF magnetron sputtering. The effects of codeposition of Mn on the surface morphology and ferromagnetism of VOx were investigated. The results of structure and morphology characterization show that the VOx film prepared by us is a kind of pure vanadium oxide film with a stoichiometric ratio between V2O3 and VO2. The introduction of Mn element causes slight distortion of VOxlattice, and the morphology of VOx evolves from a nano-rod structure to a spherical structure. The results of magnetic properties show that VOx films exhibited room-temperature ferromagnetic properties. With the ratio of Mn to V being 1:1, the saturation magnetic moment of the film first increases and then decreases. When the Mn content is 30%, the surface morphology is the most regular, and the maximum saturation magnetic moment is 345 emu/cm3.
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