Magnetic domains of single-crystal Nd2Fe14B imaged by unmodified scanning electron microscopy

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Lewis, L. H.
Wang, J.-Y.
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Canfield, Paul
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Physics and Astronomy
Physics and astronomy are basic natural sciences which attempt to describe and provide an understanding of both our world and our universe. Physics serves as the underpinning of many different disciplines including the other natural sciences and technological areas.
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Ames National Laboratory

Ames National Laboratory is a government-owned, contractor-operated national laboratory of the U.S. Department of Energy (DOE), operated by and located on the campus of Iowa State University in Ames, Iowa.

For more than 70 years, the Ames National Laboratory has successfully partnered with Iowa State University, and is unique among the 17 DOE laboratories in that it is physically located on the campus of a major research university. Many of the scientists and administrators at the Laboratory also hold faculty positions at the University and the Laboratory has access to both undergraduate and graduate student talent.

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The stray flux manifestations of surface magnetic domains found in as-grown Nd2Fe14B single crystals were observed, with a resolution in the range of 1 μm, using conventional scanning electron microscopy (SEM) without instrumental modifications. A modified image-distortion mode was applied to image the three-dimensional stray flux emanating from the sample. The simplicity of the technique and the ready adaptability of the SEM to such modifications as in situ current and magnetic field application suggest that the results of this study may be extended to investigations of other materials of technological interest, such as perpendicular media disks.
This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in Lewis, L. H., J-Y. Wang, and P. Canfield. "Magnetic domains of single-crystal Nd 2 Fe 14 B imaged by unmodified scanning electron microscopy." Journal of Applied Physics 83, no. 11 (1998): 6843-6845, and may be found at DOI: 10.1063/1.367664. Copyright 1998 American Institute of Physics. Posted with permission.