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物理学报. 2007, 56(12): 7266-7273.
doi: 10.7498/aps.56.7266.
室温生长MgO底层诱导(001)取向FePt薄膜的有序化过程对FePt成分的依赖
- 收稿日期: 2007-04-06
- 修回日期: 2007-06-01
- 刊出日期: 2007-12-20
摘要: 室温下通过磁控溅射在表面热氧化的Si基片上生长了MgO/FexPt100-x双层膜和FexPt100-x单层膜系列样品，FexPt100-x的原子成分x=48—68.研究了热处理前后不同成分FePt薄膜的晶体结构和磁性的变化，尤其是MgO底层的引入对FePt的晶体结构和磁性的影响
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关键词:
- FePt(001)薄膜 /
- L10相
English Abstract
Composition dependence of L10 ordering of FePt (001) thin films on MgO underlayer grown at room temperature
- Received Date:
06 April 2007
- Accepted Date:
01 June 2007
- Published Online:
20 December 2007
Abstract: We investigated the effect of extensive compositional change on the structure and magnetic properties of the post-annealed FexPt100-x (48≤x≤68) thin films with and without MgO underlayer deposited at room temperature. It was found that, during annealing, the FePt films on MgO underlayer with Fe-rich composition around 59at% exhibit much faster ordering than those with other compositions although the single layer FePt films were found to have the optimum composition for the chemical ordering of only slightly Fe-rich composition of 52at% of Fe. The film of MgO(10 nm)/Fe59Pt41(8 nm) after annealing at 600℃ for 30 min showed perpendicular magnetization with coercivity about 800 kA/m and the squareness was close to 1 due to the formation of (001) oriented ordering phase. The results of FePt thin films on MgO underlayer deposited at room temperature present a striking contrast with those of FePt grown on heated MgO single crystal substrate, where the optimum composition for the ordering was around 62at% of Pt. An interpretation on the observed experimental phenomena is given in this paper.
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Keywords:
- FePt(001) film /
- L10 phase
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