【摘要】 以溶胶－凝胶法制备了稀土铽或镝掺杂的钴尖晶石铁氧体纳米晶薄膜．考察了Ｔｂ或Ｄｙ的掺杂量及晶化条件对晶相的影响．结果表明，稀土离子的掺杂量ｘ超过０．３时，样品很难形成尖晶石单相．原子力显微镜对纳米晶薄膜表面形貌的观测显示，溶胶－凝胶法制备的薄膜粒度可控制在２０～５０ｎｍ，且具有较高的表面平整度．对于厚度为２００ｎｍ的薄膜，均方根粗糙度仅为４～５ｎｍ．磁特性研究发现，掺杂Ｔｂ或Ｄｙ的样品矫顽力明显提高更多还原

【Abstract】 The nanocrystalline thin films of CoFe\-\{2-x\}RE\-xO\-4 (RE=Tb,Dy) were fabricated by sol\|gel processing. By varying the doping content of rare earth ions, x, and the annealing conditions, the difficult crystallization of spinel phase was found for the samples with \{x>\}\{0.3\}, which is ascribed to te large radii of rare earth ions. AFM observation indicated that the grain size can be controlled between 20￣50 nm and the sol\|gel derived thin films have a surface with a low roughness of 4￣5 nm. The doping of Tb\+\{3+\} and Dy\+\{3+\} ions inside spinel can enhance the coercive force of CoFe\-2O\-4 films.更多还原