Phase imaging and nanoscale currents in phase objects imaged with fast electrons

被引：34
作者：
Volkov, VV [1 ]
Zhu, Y [1 ]
机构：
[1] Brookhaven Natl Lab, Dept Mat Sci, Upton, NY 11973 USA
来源：
PHYSICAL REVIEW LETTERS | 2003年 / 91卷 / 04期
关键词：
D O I：
10.1103/PhysRevLett.91.043904
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We derive the magnetic transport-of-intensity equation (MTIE) that links defocused contrast of magnetic nanoobjects imaged by partially coherent electron waves to their micromagnetic parameters. This provides Maxwell's explanation for observable contrast in terms of the Z component of currents existing around vortices in superconductors and domain vortices and walls in ferromagnets. The solution of the MTIE via Fourier transform is used for quantitative mapping of magnetic flux and projected induction in magnetic and superconducting materials imaged by Lorentz microscopy.
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