ゾル·ゲル法による Bi 置換 YIG の作製と磁気持性
ゾル·ゲル法による Bi 置換 YIG の作製と磁気持性
复制标题
溶胶-凝胶法制备双取代YIG及磁性能
DOI：
10.3379/jmsjmag.14.247
复制
发表时间：
1990
影响因子：
--
通讯作者：
壽崇 藤井
中科院分区：
文献类型：
--
作者：
幸治 松本;一弘 山口;晃史 上野;壽崇 藤井
以钇、铁、铋和铝的硝酸盐为原料，乙二醇为溶剂，采用溶胶-凝胶法合成了Bi，Al取代的钇铁石榴石。通过将凝胶溶液旋涂到玻璃基板上来制造膜。通过重复旋涂若干次来控制膜厚度。将涂膜在空气中在700°C下热处理4小时以获得YIG晶体。BixY_（3-x）Fe_5 O_（12）薄膜的磁化强度位于薄膜平面内。在Y1. 5 Bi 1. 5 Fe 3. 8Al 1. 2 O 12组份下，薄膜的磁化方向垂直于薄膜面，但随着薄膜厚度的增加，磁化方向有向薄膜面倾斜的趋势。这可以用由于衬底约束而产生的应力来解释：应力释放随着通过重复旋涂而增加的厚度而变得显著。这可以在很大程度上通过每次旋涂工艺后的热处理来消除。磁光法拉第旋转的薄膜相比，这两种热处理。
Bi, Al substituted YIG was synthesized by sol-gel method using a solution of yittrium, iron, bismuth and aluminum nitrates dissolved in ethylene glycol. Films were fabricated by spin-coating a gel solution onto glass substrates. Film thickness was controlled by repetitive spin-coating several times. Coated films were subjected to heat treatment in air at 700°C for 4 hours to obtain YIG crystal. Magnetization of the films with BixY3-xFe5O12 lies in the film plane. The films magnetized normal to the film plane were obtained at a composition of Y1.5Bi1.5Fe3.8Al1.2O12,but magnetization tends to incline toward the film plane with increasing film thickness. This may be explained in terms of stress due to substrate constraint: Stress relief becomes remarkable as thickness increases by repetitive spin-coating. This can be, to a great extent, eliminated by heat treatment after each spin coating process. Magneto-optical Faraday rotation of the films are shown in comparison with both heat treatments.