Effect of the substrate temperature on the microstructure and magnetostrictive characteristics of the Tb0.3Dy0.7Fe2 film
Effect of the substrate temperature on the microstructure and magnetostrictive characteristics of the Tb0.3Dy0.7Fe2 film
复制标题
基体温度对Tb0.3Dy0.7Fe2薄膜微观结构和磁致伸缩特性的影响
DOI：
10.1016/s0925-8388(97)00057-1
复制
发表时间：
1997
影响因子：
6.2
通讯作者：
H. Kaneko
中科院分区：
文献类型：
--
作者：
M. Wada;H. Uchida;H. Kaneko
研究了基片温度对闪蒸法制备的Tb 0. 3Dy 0. 7 Fe 2薄膜的微结构和磁致伸缩特性的影响。用透射电子显微镜和胶体Bitter法分别观察了薄膜的微观结构和磁畴结构。发现在低于405 K的衬底温度下形成的薄膜是晶粒小于5 nm的纳米晶结构，可以观察到非常高的磁致伸缩磁化率。在410 K和600 K之间的温度下形成的膜被发现具有5-10 nm的晶粒。这些晶粒尺寸，磁化强度和磁致伸缩几乎是恒定的，与温度无关。在600 K以上的温度下，晶粒尺寸显着增加到100 nm，在650 K，导致更大的X射线衍射峰和扩大的磁畴。生长的多晶薄膜，其中磁化似乎是由磁畴的运动发起的，表现出较高的最大磁化强度，然而，较低的磁致伸缩磁化率。在污染条件下形成的膜产生具有非常低的磁化强度和磁致伸缩的非晶结构，独立于低于650 K的衬底温度。
The effect of the substrate temperature of the Tb0.3Dy0.7Fe2films formed by the flash evaporation process on the microstructure and magnetostrictive characteristics was examined. The microstructures and magnetic domains of the formed films were observed by transmission electron microscopy and the colloid Bitter method, respectively. Films formed at substrate temperatures below 405 K were found to be nanocrystalline structures with grains below 5 nm, for which very high magnetostrictive susceptibility could be observed. The films formed at temperatures between 410 K and 600 K were found to have grains of 5–10 nm. These grain sizes, magnetizations and magnetostrictions were almost constant, independent of temperature. At temperatures above 600 K, the grain size markedly increased up to 100 nm at 650 K, resulting in larger X-ray diffraction peaks and enlarged magnetic domains. Grown polycrystalline films, in which magnetizations seem to be initiated by the movement of magnetic domains, exhibited higher maximum magnetizations, however, lower magnetostrictive susceptibilities. Films formed in a contaminative condition yielded amorphous structures with very low magnetizations and magnetostrictions, independent of substrate temperatures below 650 K.