Magnetic imaging with a Zernike-type phase plate in a transmission electron microscope

Shawn Pollard; Marek Malac; Marco Beleggia; Masahiro Kawasaki; Yimei Zhu

doi:10.1063/1.4803908

Magnetic imaging with a Zernike-type phase plate in a transmission electron microscope

Shawn Pollard, Marek Malac, Marco Beleggia, Masahiro Kawasaki, Yimei Zhu

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Abstract

We demonstrate the use of a hole-free phase plate (HFPP) for magnetic imaging in transmission electron microscopy by mapping the domain structure in PrDyFeB samples. The HFPP, a Zernike-like imaging method, allows for detecting magnetic signals in-focus to correlate the sample crystal structure and defects with the local magnetization topography, and to evidence stray fields protruding from the sample. Experimental and simulated results are shown and are compared with conventional Fresnel (out-of-focus) images without a phase plate. A key advantage of HFPP imaging is that the technique is free from the reference wave distortion from long-range fields affecting electron holography.

Original language	English
Article number	192401
Journal	Applied Physics Letters
Volume	102
Issue number	19
Number of pages	4
ISSN	0003-6951
DOIs	https://doi.org/10.1063/1.4803908
Publication status	Published - 2013

Bibliographical note

Copyright 2013 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Applied Physics Letters / Volume 102 / Issue 19 and may be found at http://apl.aip.org.globalproxy.cvt.dk/resource/1/applab/v102/i19/p192401_s1.

Keywords

Electron holography
Transmission electron microscopy

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ApplPhysLett 102 192401Final published version, 1.56 MB

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title = "Magnetic imaging with a Zernike-type phase plate in a transmission electron microscope",

abstract = "We demonstrate the use of a hole-free phase plate (HFPP) for magnetic imaging in transmission electron microscopy by mapping the domain structure in PrDyFeB samples. The HFPP, a Zernike-like imaging method, allows for detecting magnetic signals in-focus to correlate the sample crystal structure and defects with the local magnetization topography, and to evidence stray fields protruding from the sample. Experimental and simulated results are shown and are compared with conventional Fresnel (out-of-focus) images without a phase plate. A key advantage of HFPP imaging is that the technique is free from the reference wave distortion from long-range fields affecting electron holography.",

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AU - Zhu, Yimei

N1 - Copyright 2013 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Applied Physics Letters / Volume 102 / Issue 19 and may be found at http://apl.aip.org.globalproxy.cvt.dk/resource/1/applab/v102/i19/p192401_s1.

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N2 - We demonstrate the use of a hole-free phase plate (HFPP) for magnetic imaging in transmission electron microscopy by mapping the domain structure in PrDyFeB samples. The HFPP, a Zernike-like imaging method, allows for detecting magnetic signals in-focus to correlate the sample crystal structure and defects with the local magnetization topography, and to evidence stray fields protruding from the sample. Experimental and simulated results are shown and are compared with conventional Fresnel (out-of-focus) images without a phase plate. A key advantage of HFPP imaging is that the technique is free from the reference wave distortion from long-range fields affecting electron holography.

AB - We demonstrate the use of a hole-free phase plate (HFPP) for magnetic imaging in transmission electron microscopy by mapping the domain structure in PrDyFeB samples. The HFPP, a Zernike-like imaging method, allows for detecting magnetic signals in-focus to correlate the sample crystal structure and defects with the local magnetization topography, and to evidence stray fields protruding from the sample. Experimental and simulated results are shown and are compared with conventional Fresnel (out-of-focus) images without a phase plate. A key advantage of HFPP imaging is that the technique is free from the reference wave distortion from long-range fields affecting electron holography.

KW - Electron holography

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DO - 10.1063/1.4803908

M3 - Journal article

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JO - Applied Physics Letters

JF - Applied Physics Letters

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ER -

Magnetic imaging with a Zernike-type phase plate in a transmission electron microscope

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