Zhou Tao, Cheng Dandan, Zheng Maojun, Ma Li, Shen Wenzhong
Laboratory of Condensed Matter Spectroscopy and Opto-Electronic Physics, and Key Laboratory of Artificial Structures and Quantum Control (Ministry of Education), Department of Physics, Shanghai Jiao Tong University, Shanghai, 200240, People's Republic of China.
Nanoscale Res Lett. 2011 Mar 31;6(1):276. doi: 10.1186/1556-276X-6-276.
A novel Co/InP magnetic semiconductor nanocomposite was fabricated by electrodeposition magnetic Co nanoparticles into n-type porous InP templates in ethanol solution of cobalt chloride. The content or particle size of Co particles embedded in porous InP increased with increasing deposition time. Co particles had uniform distribution over pore sidewall surface of InP template, which was different from that of ceramic template and may open up new branch of fabrication of nanocomposites. The magnetism of such Co/InP nanocomposites can be gradually tuned from diamagnetism to ferromagnetism by increasing the deposition time of Co. Magnetic anisotropy of this Co/InP nanocomposite with magnetization easy axis along the axis of InP square channel was well realized by the competition between shape anisotropy and magnetocrystalline anisotropy. Such Co/InP nanocomposites with adjustable magnetism may have potential applications in future in the field of spin electronics.PACS: 61.46. +w · 72.80.Tm · 81.05.Rm · 75.75. +a · 82.45.Aa.
通过在氯化钴乙醇溶液中将磁性钴纳米颗粒电沉积到n型多孔InP模板中，制备了一种新型的Co/InP磁性半导体纳米复合材料。嵌入多孔InP中的Co颗粒的含量或粒径随沉积时间的增加而增加。Co颗粒在InP模板的孔侧壁表面上具有均匀分布，这与陶瓷模板不同，可能会开辟纳米复合材料制造的新分支。通过增加Co的沉积时间，这种Co/InP纳米复合材料的磁性可以从抗磁性逐渐调节为铁磁性。通过形状各向异性和磁晶各向异性之间的竞争，很好地实现了这种磁化易轴沿InP方形通道轴的Co/InP纳米复合材料的磁各向异性。这种具有可调磁性的Co/InP纳米复合材料未来可能在自旋电子学领域具有潜在应用。物理和天文学分类号：61.46. +w·72.80.Tm·81.05.Rm·75.75. +a·82.45.Aa。
