Interference and interferometry in electron holography

K Harada - Microscopy, 2021 - academic.oup.com
This paper reviews the basics of electron holography as an introduction of the holography
part of this special issue in Microscopy. We discuss the general principle of holography and …

Two types of magnetic bubbles in MnNiGa observed via Lorentz microscopy

H Nakajima, A Kotani, K Harada… - Japanese Journal of …, 2021 - iopscience.iop.org
Magnetic bubbles are remarkable spin structures that developed in uniaxial magnets with
strong magnetocrystalline anisotropy. Several contradictory reports have been published …

[HTML][HTML] Electron holography for observing magnetic bubbles and stripe-shaped domains in magnetic fields

K Harada, H Nakajima, K Shimada, S Mori… - Micron, 2022 - Elsevier
An electron holography optical system was developed for relatively high magnetic fields up
to 500 mT. The objective lens worked as a magnetic field generator for the specimen and the …

Microscopic magnetization distribution of Bloch lines in a uniaxial magnet

K Kurushima, K Tanaka, H Nakajima… - Journal of Applied …, 2019 - pubs.aip.org
Bloch lines are formed to reduce the magnetostatic energy generated by the Bloch walls in
uniaxial magnets. Recently, it is reported that Bloch lines play important roles in the …

[PDF][PDF] 基于隐私保护机制的辐射光源衍射图像筛选

许康, 祝永新, 吴波, 郑小盈, 陈凌曜 - Laser & Optoelectronics …, 2023 - researching.cn
摘要同步辐射光源产生超高速的衍射图像数据流, 需要通过数据筛选降低数据传输和存储的压力
. 但互相竞争的研究小组不愿意分享数据, 现有基于深度学习的筛选方法难以应对隐私保护下 …

Lensless Fourier transform electron holography applied to vortex beam analysis

K Harada, YA Ono, Y Takahashi - Microscopy, 2020 - academic.oup.com
Lensless Fourier transform holography has been developed. By treating Bragg diffraction
waves as object waves and a transmitted spherical wave as a reference wave, these two …

Recent advances in small-angle electron diffraction and Lorentz microscopy

S Mori, H Nakajima, A Kotani, K Harada - Microscopy, 2021 - academic.oup.com
We describe small-angle electron diffraction (SmAED) and Lorentz microscopy using a
conventional transmission electron microscope. In SmAED, electron diffraction patterns with …

Observation of magnetic domains in uniaxial magnets via small-angle electron diffraction and Foucault imaging

H Nakajima, A Kotani, K Harada… - Japanese Journal of …, 2019 - iopscience.iop.org
Observation of magnetic domains is important in understanding the magnetic properties of
magnetic materials and devices. In this paper, we report that the magnetic domains of M …

Electron holography for vortex beams

K Harada, K Shimada, YA Ono - Applied Physics Express, 2020 - iopscience.iop.org
A combined technology of vortex beam technique and electron holography has been
developed. A range about 10 times the diameter of the grating opening was irradiated and …

Magnetic bubbles in an M-type hexagonal ferrite observed by hollow-cone Foucault imaging and small-angle electron diffraction

A Kotani, H Nakajima, A Kawaguchi… - Japanese Journal of …, 2020 - iopscience.iop.org
We report hollow-cone imaging and small-angle electron diffraction (SmAED) of nanoscale
magnetic textures such as magnetic-striped domains and magnetic bubbles of M-type …