纳米Fe1-xCox/Al2O3复合薄膜结构和磁性能的研究

Structure and magnetic properties of nano Fe1-xCox/Al2O3 composite thin films

用溶胶-凝胶旋涂法结合氢气还原工艺在Si基片上制备Fe、Co不同原子数分数的Fe1-xCox/Al2O3(x=0.2、0.4、0.6、0.8)纳米薄膜试样,其中FeCo与Al2O3的质量分数比为7:3,试样共旋涂4层,900℃还原1 h。利用XRD、VSM等测试方法,研究在表面氧化的Si基片上制备Fe1-xCox/Al2O3薄膜试样的结构及磁性,讨论Co含量对薄膜样品结构和磁性的影响。结果表明:随着Co含量增加,FeCo合金的晶粒尺寸逐渐减小,单畴结构FeCo合金的晶粒尺寸减小,矫顽力和饱和磁化强度也随之减小。

Fe1-xCox/Al2 O3(x=0.2、0.4、0.6、0.8) nano-film samples with different Fe and Co atomic percentages were prepared on the Si substrate by sol-gel spin coating method combined with hydrogen reduction process,and the ratio of the mass percentage of FeCo to Al2 O3 was 7:3.The samples were spin-coated 4 layers and reduced at 900℃ for 1 h.XRD and VSM were used to study and discuss the effects of Co atom on the structure and magnetic properties of thin sample films prepared on surfaceoxidized Si substrates.The results show that with the increase of Co content,the grain size of FeCo alloy gradually decreases,the grain size of FeCo alloy with single domain structure decreases,and the coercive force and saturation magnetization also decrease.