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Electron Mirror Microscopy of Magnetic Domains

机译：磁畴的电子镜显微镜

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摘要

Electron mirror microscopy is a rather novel research instrument. It has recently been demonstrated that it can provide micrographs not only of the relief structure of a specimen but also of such purely electrical properties as contact potentials, conductivities, surface charges, and even space charges. This paper deals with the feasibility of electron mirror microscopy for pictorial representation of magnetic properties in general, and of magnetic domain patterns in particular. It is shown that electron mirror microscopy is actually a feasible and independent method for electronically depicting magnetic patterns. The section of the paper dealing with experimental work begins with magnetic specimens of artificial nature, e.g., a recorder head, containing one or more linear magnetic dipole stray fields which are controllable. After establishing the basic facts of magnetic contrast formation with this type specimen, the paper reports on experiments conducted with specimens of barium ferrite and nickel ferrite containing actual magnetic domain patterns. Samples of electron mirror micrographs of domain patterns of these materials are shown and compared with domain patterns of the same specimen areas obtained by the conventional powder technique. The identical nature of the configurations on both micrographs provided final proof of the feasibility of electron mirror microscopy in depicting magnetic patterns. Criteria required to distinguish magnetic patterns from those of electrical or relief origin are derived from the experimental findings and are verified by elementary theoretical considerations about magnetic contrast formation in electron mirror microscopy.
机译：电子镜显微镜是一种相当新颖的研究仪器。最近已经证明，它不仅可以提供样品的浮雕结构的显微照片，而且还可以提供诸如接触电势，电导率，表面电荷甚至空间电荷之类的纯电性能的显微照片。本文探讨了用电子镜显微镜通常以图形方式表示磁性能，特别是磁畴图形的可行性。结果表明，电子镜显微镜实际上是一种可行的且独立的方法，可通过电子方式描绘磁图。本文涉及实验工作的部分从人造的磁性样本开始，例如记录头，其中包含一个或多个可控的线性磁偶极子杂散场。在建立了这种类型的样品形成磁性对比的基本事实之后，本文报道了使用包含实际磁畴图案的钡铁氧体和镍铁氧体样品进行的实验。示出了这些材料的畴图案的电子镜显微照片的样品，并将其与通过常规粉末技术获得的相同样品区域的畴图案进行比较。两张显微照片上配置的相同性质为电子镜显微镜在描绘磁性图案方面的可行性提供了最终证据。从实验结果中得出区分磁性图案与​​电或浮雕来源的磁性图案所需的标准，并已通过有关电子镜显微术中形成磁性对比的基本理论考虑加以验证。

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  • 来源
    《Journal of Applied Physics》 |1957年第9期|共9页
  • 作者

    Mayer Ludwig;

  • 作者单位

    Mechanical Division of General Mills, Inc., Minneapolis, Minnesota;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
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