<正> 稀土过渡族金属合金采用溅射方法容易制得非晶态材料,经晶化处理后得到的矫顽力要比一般制造的晶体永磁材料为高,例如等离子喷镀的非晶SmCo_5磁体经晶化处理后内禀矫顽力_iH_c由小于3000 Oe变成67500 Oe,远比一般烧结SmCo_5磁体_iH_c=10000—30000Oe的高。至于稀土过渡族金属薄膜在晶化过程中结构的变化,由于薄膜质量很小,且易氧化,因此文献中很少报道。本文研究了SmCo_5非晶薄膜晶化过程中
It is shown that the crystallization of the sputtered amorphous Sin-Co magnetic films is entirely different from that of the thicker plasma-sprayed ones given in literature. On heating the sputtered amorphous films, a β-Co transition metal phase forms first, no rare earth-transition intermetallic compound was observed till 750℃. This is believed to be related to the higher surface energy of thin films.
参考文献
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