MAGNETIC-PROPERTIES OF ANODIC OXIDE COATINGS ON ALUMINUM CONTAINING ELECTRODEPOSITED CO AND CO-NI
MAGNETIC-PROPERTIES OF ANODIC OXIDE COATINGS ON ALUMINUM CONTAINING ELECTRODEPOSITED CO AND CO-NI
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DOI：
10.1149/1.2134152
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发表时间：
1975-01-01
影响因子：
3.9
通讯作者：
UEDA, R
中科院分区：
文献类型：
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作者：
KAWAI, S;UEDA, R
将钴和钴镍合金电沉积到铝表面各种阳极氧化膜的微孔中。细小的颗粒状金属在阻挡层上析出，形成柱状结构。虽然钴或镍膜在垂直于表面方向上表现出明显的磁各向异性，但由约50%的钴组成的合金膜在水平方向上表现出强烈的各向异性，沿着。矫顽力的范围从约5.0.0到约11.00欧，剩余磁化强度的密度上升到1000高斯以上。当铝表面在某些电解液中阳极氧化时，形成具有电解条件特征的微孔膜（12）。Asada（3）发现，施加交流电后，将未密封的氧化物涂层浸入金属盐溶液中时，会显示出特殊的颜色。其中一位作者（4）在之前的一项研究中观察到，当使用硫酸镍时，金属镍和氧化镍会沉淀在微孔中。作为电解质。由于钴具有比镍更大的饱和磁化强度，钴和钴合金的沉积物对于磁性装置中的应用特别感兴趣。Zetner（5）报道了电沉积钴层具有150-500 oe的矫顽力和4000-80'00高斯的剩余磁化强度，并且在沉积期间使用AC~-DC可以将矫顽力增加到高达8' 00 oe。Morral（6）发现，电沉积钴层的磁性取决于电解槽温度、电流密度、钴盐浓度、交流/直流比和电解时间。
Cobalt and Co-Ni alloy were electrodeposited into the micropores of various kinds of anodic oxide films on aluminum. Fine granular metals precipitated on the barrier layer and formed columnar structures. Although the films of cobalt or nickel showed remarkable magnetic anisotropies perpendicular to the surface, the alloy films which consisted of approximately 50% cobalt showed a strong anisotropy along the horizontal direction. Coercive forces ranged from about 5.0, 0 to about 11, 00 oe and the density of residual magnetization rose above 1000 gauss. The films may have applications in magnetic memories and recording devices.When the surface of aluminum is anodized in some electrolytes, a film with micropores characteristic of the electrolytic conditions is formed (12). Asada (3) found that unsealed oxide coatings show peculiar colors when immersed in metal salt solutions after application of ac One of the authors (4) in a previous study observed that metallic nickel and nickel oxide were precipitated in the micropores when nickel sulfate was used as the electrolyte. As cobalt has a larger saturation magnetization than nickel, deposits of cobalt and cobalt alloy are of particular interest for applications in magnetic devices. Zetner (5) reported that eleetrodeposited cobalt layers have a coercive force of 150-500 oe and a residual magnetization of 4000-80'00 gauss, and that the coercive force could be increased to as high as 8'00 oe by the use of ac~-dc during deposition. Morral (6) found that the magnetic properties of electrodeposited cobalt layers depend on bath temperature, current density, concentration of cobalt salt, ratio of ac/dc, and time of electrolysis.