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首页> 外文期刊>Physical review >Anomalous x-ray diffraction measurements of long-range order in (OOl)-textured L1_0 FePtCu thin films
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Anomalous x-ray diffraction measurements of long-range order in (OOl)-textured L1_0 FePtCu thin films

机译:(OOl)织构的L1_0 FePtCu薄膜中远距离有序的X射线衍射测量

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摘要

Thin films of L1_0-ordered (Fe_(51)Pt_(49))_(100- x)Cu_x with (001) texture were obtained by rapid thermal annealing of FePt(5 nm-t)/Cu(t) bilayers deposited by magnetron sputtering at room temperature on thermally oxidized Si(001) substrates. The L1_0 long-range ordering fully described by two independent chemical order parameters was investigated by anomalous x-ray diffraction measurements performed at the Fe K and Pt Lni edges. These measurements reveal that Cu atoms are preferentially located on the Fe-rich (001) planes. Up to a Cu content of 9 at.%, the Cu addition favors Ll_0 ordering particularly after annealing to 600℃, giving rise to an increase in effective magnetic anisotropy. Beyond this composition, Cu atoms displace a large fraction of Fe atoms to the Pt-rich (001) planes, leading to a rapid decrease in magnetic anisotropy and saturation magnetization.
机译:通过快速热退火沉积的FePt(5 nm-t)/ Cu(t)双层薄膜,获得具有L1_0级(Fe_(51)Pt_(49))_(100-x)Cu_x具有(001)织构的薄膜。室温下在热氧化的Si(001)衬底上进行磁控溅射。通过在Fe K和Pt Lni边缘进行的异常X射线衍射测量研究了由两个独立的化学有序参数充分描述的L1_0远程有序。这些测量结果表明,Cu原子优先位于富Fe(001)平面上。高达9原子%的Cu含量,特别是在退火至600℃之后,Cu的添加有利于Ll_0有序化,从而导致有效磁各向异性的增加。除此成分外,Cu原子将大部分Fe原子置换到富Pt(001)平面上,导致磁各向异性和饱和磁化强度迅速降低。

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  • 来源
    《Physical review》 |2012年第2期|p.024204.1-024204.7|共7页
  • 作者单位

    Laboratory of Science and Engineering of Materials and Processes, Grenoble Institute of Technology, Centre National de la Recherche Scientifique, Universite Joseph Fourier, Boite Postale No. 75, F-38402 Saint Martin d'Heres, France;

    Institute of Physics, Chemnitz University of Technology, D-09107 Chemnitz, Germany;

    Institute of Physics, Chemnitz University of Technology, D-09107 Chemnitz, Germany;

    Institute of Physics, Chemnitz University of Technology, D-09107 Chemnitz, Germany,Institute for Integrative Nanosciences, Leibniz Institute for Solid State and Materials Research, D-01069 Dresden,Germany;

    Institut Neel, Centre National de la Recherche Scientifique, Universite Joseph Fourier,Boite Postale No. 166, 38042 Grenoble Cedex 9, France;

    Institute of Physics, Chemnitz University of Technology, D-09107 Chemnitz, Germany;

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  • 正文语种 eng
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  • 关键词

    alloys; thin film structure and morphology solid surfaces and solid-solid interfaces: structure and energetics; magnetic recording materials;

    机译:合金;薄膜结构和形态固体表面和固体-固体界面:结构和能量学;磁记录材料;

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