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Self-assembled magnetic nanospheres with three-dimensional magnetic vortex

机译：具有三维磁涡旋的自组装磁性纳米球

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摘要

We report the electron holography images of spin configurations in peculiar assemblies of soft magnetic nanoparticles in single-, double-, triple-, or quadruple-sphere geometrical arrangements, in which each particle has a three-dimensional (3D) magnetic-vortex structure. Micromagnetic numerical calculations reveal that the uniqueness of the nanoparticles' 3D vortex structure plays a crucial role in their assembly, especially in terms of the contrasting contributions of the exchange and dipolar interactions to their binding energies. The results represent physical insights into the assembly of 3D-vortex-structure magnetic nanoparticles in different geometrical configurations and offer a practical means of controlling those assemblies.
机译：我们报告的软磁性纳米粒子在单，双，三，或四球体的几何排列，其中每个粒子具有三维（3D）磁涡旋结构的特殊组件中的自旋配置的自旋配置的电子全息图像。微磁数值计算表明，纳米粒子的3D涡旋结构的独特性在其组装中起着至关重要的作用，尤其是在交换和偶极相互作用对其结合能的对比作用方面。结果代表了对不同几何构型的3D涡旋结构磁性纳米粒子组装的物理见解，并提供了控制这些组装的实用方法。

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  • 来源
    《Applied Physics Letters 》 |2014年第23期| 232402.1-232402.5| 共5页
  • 作者

    Min-Kwan Kim; Prasanta Dhak; Ha-Youn Lee; Jae-Hyeok Lee; Myoung-Woo Yoo; Jehyun Lee; Kyoungsuk Jin; Arim Chu; Ki Tae Nam; Hyun Soon Park; Shinji Aizawa; Toshiaki Tanigaki; Daisuke Shindo; Miyoung Kim; Sang-Koog Kim;

  • 作者单位

    National Creative Research Initiative Center for Spin Dynamics and Spin-Wave Devices, Nanospinics Laboratory, Research Institute of Advanced Materials, Department of Materials Science and Engineering, Seoul National University, Seoul 151-744, South Korea;

    National Creative Research Initiative Center for Spin Dynamics and Spin-Wave Devices, Nanospinics Laboratory, Research Institute of Advanced Materials, Department of Materials Science and Engineering, Seoul National University, Seoul 151-744, South Korea;

    National Creative Research Initiative Center for Spin Dynamics and Spin-Wave Devices, Nanospinics Laboratory, Research Institute of Advanced Materials, Department of Materials Science and Engineering, Seoul National University, Seoul 151-744, South Korea;

    National Creative Research Initiative Center for Spin Dynamics and Spin-Wave Devices, Nanospinics Laboratory, Research Institute of Advanced Materials, Department of Materials Science and Engineering, Seoul National University, Seoul 151-744, South Korea;

    National Creative Research Initiative Center for Spin Dynamics and Spin-Wave Devices, Nanospinics Laboratory, Research Institute of Advanced Materials, Department of Materials Science and Engineering, Seoul National University, Seoul 151-744, South Korea;

    National Creative Research Initiative Center for Spin Dynamics and Spin-Wave Devices, Nanospinics Laboratory, Research Institute of Advanced Materials, Department of Materials Science and Engineering, Seoul National University, Seoul 151-744, South Korea;

    Department of Materials Science and Engineering, Seoul National University, Seoul 151-744, South Korea;

    Department of Materials Science and Engineering, Seoul National University, Seoul 151-744, South Korea;

    Department of Materials Science and Engineering, Seoul National University, Seoul 151-744, South Korea;

    Department of Materials Science and Engineering, Dong-A University, Busan 604-714, South Korea;

    Center for Emergent Matter Science (CEMS), RIKEN, Hirosawa 2-1, Wako, Saitama 351-0198, Japan;

    Center for Emergent Matter Science (CEMS), RIKEN, Hirosawa 2-1, Wako, Saitama 351-0198, Japan,Hitachi, Ltd., Central Research Laboratory, Hatoyama, Saitama 350-0395, Japan;

    Center for Emergent Matter Science (CEMS), RIKEN, Hirosawa 2-1, Wako, Saitama 351-0198, Japan,Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577, Japan;

    Department of Materials Science and Engineering, Seoul National University, Seoul 151-744, South Korea;

    National Creative Research Initiative Center for Spin Dynamics and Spin-Wave Devices, Nanospinics Laboratory, Research Institute of Advanced Materials, Department of Materials Science and Engineering, Seoul National University, Seoul 151-744, South Korea;

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