摘要
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L10 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 5 0 0℃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) ]1 3薄膜在 35 0℃热处理后 ,有序度已经增加到 0 6 ,相应矫顽力达到了 5 0 1kA 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层膜界面的消失提供了有序化过程额外的驱动力 .
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 the range of 300-550 degrees C. The multilayered structure is an effective approach for reducing the ordering temperature of FePt. The ordering parameter S is evaluated to be 0.6, and correspondingly the coercivity is evaluated to be 501 kA/m in [Fe (1.5 nm)/Pt(1.5 nm)](13) multilayers annealed at 350 degrees C for 20 min. Relatively low ordering temperature for the multilayer is due to the extra driving force of ordering process caused by the vanishing of the multilayer interface at annealing.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2005年第4期1836-1840,共5页
Acta Physica Sinica
基金
国家自然科学基金 (批准号 :5 0 3 0 10 0 2 )
北京市科技新星计划 (批准号 :H0 2 0 82 12 90 12 0 )资助的课题~~
关键词
多层膜
有序相
磁控溅射
薄膜生长
L1(0)-FePt order phase
magnetron sputtering
ordering parameter
Fe/Pt multilayer
