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中国物理学会期刊

利用[Fe/Pt]n多层膜降低L10-FePt有序化温度

CSTR: 32037.14.aps.54.1836

Lowering of ordering temperature for L100-FePt in Fe/Pt multilayers

CSTR: 32037.14.aps.54.1836
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  • 采用直流磁控溅射方法制备了Fe/Pt多层膜和FePt单层薄膜,再经不同温度真空热处理得到 了有序相L100-FePt薄膜.通过x射线衍射谱和磁性研究表明,FePt单层薄膜需 要在500℃ 以上热处理,才能开始有序化转变,而Fe/Pt多层膜可以降低FePt薄膜有序化温度.[Fe(1 5nm)/Pt(15nm)]1313薄膜在350℃热处理后,有序度已经增加到 06,相应矫 顽力达到了501kA/m.多层膜化促进有序化在较低的温度下进行,这是由于热处理过程中多

     

    Fe/Pt multilayers and FePt thin films were prepared by DC magnetron sputtering. The as-prepared samples were subjected to vacuum annealing at temperatures in t he range of 300—550℃. The multilayered structure is an effective approach fo r reducing the ordering temperature of FePt. The ordering parameter S is evaluated to be 06, and correspondingly the coercivity is evaluated to be 501kA/m in [Fe(15nm)/Pt(15nm)]1313 multilayers annealed at 350℃ for 20min. Relatively low ordering temperature for the multilayer is due to the e xtra driving force of ordering process caused by the vanishing of the multilayer interface at annealing.

     

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