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Fe nanomagnets with unusual size-dependent magnetization directions produced by fast laser-induced self-organization

机译:通过快速激光诱导的自组织产生具有异常的尺寸依赖性磁化方向的铁纳米磁体

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摘要

Laser-induced melting of ultrathin films can lead to self-organized arrays of hemispherical particles. We have applied this procedure to assemble arrays of Fe nanomagnets on SiO_2 substrates. Morphological studies showed presence of spatial short range order (SRO) in the array. Magnetic properties were studied at room temperature using zero-field magnetic force microscopy (MFM). The particles upto 55 nm in diameter showed in-plane (≤ 45°), compared to out-rnof-plane magnetization directions (≥ 45°) for the larger particles. The size-dependent orientation of magnetization for these hemispherical particles, was attributed to the dominating magnetostrictive energy and a size-dependent residual strain.
机译:激光诱导的超薄薄膜熔化会导致半球形颗粒的自组织阵列。我们已应用此程序在SiO_2衬底上组装Fe纳米磁体阵列。形态学研究表明阵列中存在空间短程有序(SRO)。使用零场磁力显微镜(MFM)在室温下研究了磁性。与较大粒子相比,直径最大55 nm的粒子显示出面内(≤45°),而面外磁化方向(≥45°)。这些半球形颗粒的磁化强度取决于尺寸的方向,这归因于主要的磁致伸缩能和尺寸相关的残余应变。

著录项

  • 来源
  • 会议地点 San Diego CA(US)
  • 作者单位

    Department of Physics, Washington University in St. Louis, MO, 63130rnCenter for Materials Innovation, Washington University in St. Louis, MO, 63130;

    Department of Materials Science and Engineering, University of Tennessee, Knoxville, TN, 37996;

    Department of Physics, Washington University in St. Louis, MO, 63130rnCenter for Materials Innovation, Washington University in St. Louis, MO, 63130;

    Department of Materials Science and Engineering, University of Tennessee, Knoxville, TN, 37996 Department of Chemical and Biomolecular Engineering, University of Tennessee, Knoxville, TN,37996;

  • 会议组织
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 特种结构材料;
  • 关键词

    self-organization; nanomagnetism; magnetostriction;

    机译:自组织纳米磁性磁致伸缩;

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