本文利用脉冲激光沉积方法制备了NiFe2O4磁性绝缘薄膜.X-射线衍射线性扫描测量表明,在MgO(110)单晶衬底上可以生长出高质量的NiFe2O4外延薄膜,原子力显微镜显示其具有平整的表面形貌.我们还研究了后退火处理对样品结构、表面形貌和磁性的影响.结果表明,后退火后薄膜的结构和表面形貌都发生了明显的改变,样品的磁性得到增强.这些效应可归结为在氧气氛下退火处理导致的氧含量的变化以及退火过程中阳离子分布和价态发生改变.
参考文献
| [1] | T. Kiyomura;Y. Maruo;M. Gomi .Electrical properties of MgO insulating layers in spin-dependent tunneling junctions using Fe_(3)O_(4)[J].Journal of Applied Physics,2000(8):4768-4771. |
| [2] | Rezlescu N;Iftimie N;Rezlescu E;Doroftei C;Popa PD .Semiconducting gas sensor for acetone based on the fine grained nickel ferrite[J].Sensors and Actuators, B. Chemical,2006(1):427-432. |
| [3] | R.H. Kodama .magnetic nanoparticles[J].Journal of Magnetism and Magnetic Materials,1999(1/3):359-372. |
| [4] | Mahmoud Goodarz Naseri;Elias B. Saion;Hossein Abbastabar Ahangar .Simple preparation and characterization of nickel ferrite nanocrystals by a thermal treatment method[J].Powder Technology: An International Journal on the Science and Technology of Wet and Dry Particulate Systems,2011(1):80-88. |
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