世界上只有极少数的物质是铁磁性物质，比如铁钴镍等。

The world only a handful of ferromagnetic materials, such as material is iron cobalt nickel etc.

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本文采用凝胶前驱体纤维热分解还原法制备了镍、镍-钴、铁、镍-铁四种磁性金属纤维。

In this paper, the Ni, Ni-Co, Fe and Ni-Fe magnetic fibers were prepared by thermal decomposition reducing method of gel precursor fibers.

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镀金：有金钴，金镍，金铁，一般使用金钴系最多。

The gilded with gold: nickel, cobalt, gold, gold iron generally use gold cobalt is most.

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