Effect of Superparamagnetic Fe3O4 Nanoparticles on Schottky Barriers of Graphene
Effect of Superparamagnetic Fe3O4 Nanoparticles on Schottky Barriers of Graphene
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DOI：
10.1109/tmag.2015.2436924
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发表时间：
2015-05
影响因子：
2.1
通讯作者：
Junran Zhang;Zhenyao Wu;Minhao Zhang;W. Niu;Ming Gao;Ying Zhou;Wenqing Liu;Xuefeng Wang;Rong Zhang;Yongbing Xu
中科院分区：
文献类型：
--
作者：
Junran Zhang;Zhenyao Wu;Minhao Zhang;W. Niu;Ming Gao;Ying Zhou;Wenqing Liu;Xuefeng Wang;Rong Zhang;Yongbing Xu
采用水热法制备了超顺磁性Fe 3 O 4纳米颗粒，并通过机械剥离法从Kish石墨上剥离出单层石墨烯片，研究了超顺磁性Fe 3 O 4纳米颗粒对石墨烯肖特基势垒的影响。Fe 3 O 4纳米粒子具有超顺磁性，室温下饱和磁矩约为32 emu/g。我们已经发现，修饰在石墨烯表面的Fe 3 O 4纳米颗粒可以显着地改变整个器件的肖特基势垒，可能是由于来自石墨烯附近的Fe 3 O 4纳米颗粒的磁杂散场。肖特基势垒可以通过Fe_3O_4纳米颗粒的量进一步调节。
We demonstrated the effect of superparamagnetic Fe3O4 nanoparticles on the Schottky barriers of graphene, in which the Fe3O4 nanoparticles were fabricated by a hydrothermal method, and the single-layer graphene sheets were mechanically exfoliated from Kish graphite. The Fe3O4 nanoparticles were superparamagnetic with the saturation magnetic moment of ~32emu/g at room temperature. We have found that the Fe3O4 nanoparticles decorated on the graphene surface can dramatically modify the Schottky barriers of the whole devices possibly due to the magnetic stray field from the Fe3O4 nanoparticles in proximity to graphene. The Schottky barrier could be further tuned by the quantity of Fe3O4 nanoparticles.