期刊
PHYSICAL REVIEW LETTERS
卷 104, 期 25, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.104.253901
关键词
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资金
- U.S. Department of Energy, Basic Energy Sciences [DE-FG02-01ER45893]
- University of Chicago Argonne, LLC [DE-AC02-06CH11357]
- Center for Nanoscale Materials at Argonne National Laboratory [DE-AC02-06CH11357]
- U.S. Department of Energy (DOE) [DE-FG02-01ER45893] Funding Source: U.S. Department of Energy (DOE)
The vector potential is central to a number of areas of condensed matter physics, such as superconductivity and magnetism. We have used a combination of electron wave phase reconstruction and electron tomographic reconstruction to experimentally measure and visualize the three-dimensional vector potential in and around a magnetic Permalloy structure. The method can probe the vector potential of the patterned structures with a resolution of about 13 nm. A transmission electron microscope operated in the Lorentz mode is used to record four tomographic tilt series. Measurements for a square Permalloy structure with an internal closure domain configuration are presented.
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