Electrodeposition of highly functional thin films for magnetic recording devices of the next century
Electrodeposition of highly functional thin films for magnetic recording devices of the next century
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DOI：
10.1016/s0013-4686(00)00407-2
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发表时间：
2000-06
影响因子：
6.6
通讯作者：
T. Osaka
中科院分区：
文献类型：
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作者：
T. Osaka
本文主要以作者课题组的工作为基础，综述了未来磁记录磁头用软磁薄膜的研究与开发的最新进展。采用电沉积方法成功制备了具有高饱和磁通密度b和低矫顽力hc的CoNiFe三元合金薄膜。一种典型的薄膜设计为“HB-CoNiFe”，其成分为Co65Ni12Fe23（at）。%)， BS= 2.0-2.1 T， HC<2 Oe。对b和hc以外的性质也进行了研究；即磁致伸缩，λS，腐蚀性能和薄膜电阻率ρ。成功地获得低hc和高bss的关键是形成具有非常细的晶体的薄膜。少量的硫被发现是必要的，以产生这样的薄膜与所需的磁性。该薄膜已被应用于构建一种新型的融合磁磁头，被认为是实现超高密度磁记录的突破。
A review is presented of the recent progress in research and development of soft magnetic films for magnetic recording heads of the future primarily on the basis of the work performed by the author’s research group. Films of CoNiFe ternary alloy with high saturation magnetic flux density BSand low coercivity, HCwere successfully produced by electrodeposition. A typical film, designed as ‘HB-CoNiFe’, had the composition of Co65Ni12Fe23(at.%) with BS=2.0–2.1 T and HC<2 Oe. Properties other than BSand HCwere also investigated; namely, magnetostriction, λS, corrosion properties, and film resistivity ρ. The key to the success in obtaining low HCwith high BSwas to form film with very fine crystals. The inclusion of small amount of sulfur was found to be essential for producing such a film with the desired magnetic properties. The film has been applied to the construction of a new type of merged-GMR head, which is considered as a breakthrough for materializing ultra high-density magnetic recording.