138 citations · 331 across the 16 of their papers we have counts for
10 papers · 1 filter
Magnetic textures in a hexaferrite thin film and their response to magnetic fields revealed by phase microscopy
Atsuhiro Kotani, Ken Harada, Marek Malac +3
We investigated magnetic textures in a Sc-doped hexaferrite film by means of phase microscopy (PM) with a hole-free phase plate in a transmission electron microscope. In a zero mag…
Glasslike phonon excitation caused by ferroelectric structural instability
Y. Ishii, A. Yamamoto, N. Sato +5
Quest for new states of matter near an ordered phase is a promising route for making modern physics forward. By probing thermal properties of a ferroelectric (FE) crystal Ba1-xSrxA…
Magnetic bubbles in an M-type hexagonal ferrite observed by hollow-cone Foucault imaging and small-angle electron diffraction
Atsuhiro Kotani, Hiroshi Nakajima, Atsushi Kawaguchi +5
We report hollow-cone imaging and small-angle electron diffraction of nanoscale magnetic textures such as magnetic-striped domains and magnetic bubbles of M-type hexagonal ferrite…
Foucault imaging and small-angle electron diffraction in controlled external magnetic fields
Hiroshi Nakajima, Atsuhiro Kotani, Ken Harada +2
We report a method for acquiring Foucault images and small-angle electron diffraction patterns in external magnetic fields using a conventional transmission electron microscope wit…
Electron diffraction covering a wide angular range from Bragg diffraction to small-angle diffraction
Hiroshi Nakajima, Atsuhiro Kotani, Ken Harada +1
We construct an electron optical system to investigate Bragg diffraction (the crystal lattice plane, - rad) with the objective lens turned off by adjusting the cu…
Charged domain walls and crystallographic microstructures in hybrid improper ferroelectric CaSrTiO
Hiroshi Nakajima, Koji Shigematsu, Yoichi Horibe +2
The charged domain walls in ferroelectric materials exhibit intriguing physical properties. We examine herein the charged-domain-wall structures in CaSrTiO usin…