Related Experiment Video
Updated: Aug 30, 2026

Optimizing Magnetic Force Microscopy Resolution and Sensitivity to Visualize Nanoscale Magnetic Domains
Published on: July 20, 2022
Profile structure of magnetic flux lines in type-II superconductor from a rectangular electron hologram
Ken Harada1, Marco Beleggia, Junji Endo
1Advanced Research Laboratory, Hitachi Ltd, Hatoyama, Saitama 350-0395, Japan. harada@harl.hitachi.co.jp
Abstract:
Profile magnetic configuration of a quantized flux line and flux-line lattice penetrating a type-II superconductor thin foil, niobium, was observed by electron holography and Lorentz microscopy using a 300 kV field-emission electron microscope. Each single flux line was distributed periodically as lattice structure in the mixed state just below its critical temperature of 8.5 K, while at low temperature of 5 K the flux lines were weakly bound as bundles. In order to observe the flux-line distribution over a wide area, discrete Fourier transform reconstruction in the holography was extended for a rectangular area without loss of information and data precision.
Related Concept Videos
Magnetic Field Lines
Magnetic field lines follow several hard-and-fast rules:
Magnetic Field Of A Current Loop
Magnetic Field due to Moving Charges
Consider a point charge moving with a constant velocity. Like the electric field, the magnetic field at any point is directly proportional to the magnitude of the charge and inversely proportional to the square of the distance between the source point and the field point. However, unlike the electric field, the magnetic field is always perpendicular to the plane containing the line...
Magnetic Flux
Suppose a surface is divided into elements of area dA. For each element, the component of the magnetic field that is normal to the...
Types Of Superconductors
Magnetic Field Due to Two Straight Wires
