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X-ray imaging of vortex cores in confined magnetic structures

机译：受限磁结构中涡旋核的X射线成像

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摘要

Cores of magnetic vortices in micron-sized NiFe disk structures, with thicknesses between 150 and 50 nm, were imaged and analyzed by high-resolution magnetic soft x-ray microscopy. A decrease of the vortex-core radius was observed from approximately 38 to 18 nm with decreasing disk thickness. By comparing with full three-dimensional micromagnetic simulations showing the well-known barrel structure, we obtained excellent agreement, taking into account instrumental broadening and a small perpendicular anisotropy. The proven magnetic spatial resolution of better than 25 nm was sufficient to identify a negative dip close to the vortex core, originating from stray fields of the core. Magnetic vortex structures can serve as test objects for evaluating sensitivity and spatial resolution of advanced magnetic microscopy techniques.
机译：使用高分辨率的磁性软X射线显微镜对厚度为150至50 nm的微米大小的NiFe盘结构中的磁涡旋核心进行成像和分析。随着圆盘厚度的减小，涡流芯半径从大约38 nm减小到18 nm。通过与显示众所周知的枪管结构的完整三维微磁模拟进行比较，考虑到仪器加宽和较小的垂直各向异性，我们获得了极好的一致性。业已证明，优于25 nm的磁空间分辨率足以识别出靠近涡旋磁芯的负倾角，该负倾角源自磁芯的杂散场。磁涡旋结构可以用作测试对象，以评估先进的磁显微镜技术的灵敏度和空间分辨率。

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  • 来源
    《Physical review》 |2011年第21期|p.212402.1-212402.4|共4页
  • 作者

    Peter Fischer; Mi-Young Im; Shinya Kasai; Keisuke Yamada; Teruo Ono; André Thiaville;

  • 作者单位

    Center for X-Ray Optics, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, California 94720, USA;

    Center for X-Ray Optics, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, California 94720, USA;

    Magnetic Materials Center, National Institute for Materials Science (NIMS), 1-2-1 Sengen, Tsukuba, Ibaraki, 305-0047 Japan;

    nstitute for Chemical Research, Kyoto University, Gokasyo, Uji 611-0011, Japan;

    nstitute for Chemical Research, Kyoto University, Gokasyo, Uji 611-0011, Japan;

    Laboratoire de Physique des Solides, Universite Paris-sud, CNRS UMR 8502, Bâtiment 510, F-91405 Orsay Cedex, France;

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  • 正文语种 eng
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  • 关键词

    domain structure (including magnetic bubbles); X-ray microscopy; magnetooptical effects;

    机译：畴结构（包括磁性气泡）;X射线显微镜;磁光效应;

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