Junichi Kawamura
Osaka University
Network
Latest external collaboration on country level. Dive into details by clicking on the dots.
Publication
Featured researches published by Junichi Kawamura.
Journal of Applied Physics | 2004
Junichi Kawamura; Kazuhisa Sato; Yoshihiko Hirotsu
Oriented nanocomposite particles of α-Fe and ordered L10-FePd have been fabricated by electron-beam deposition and successive postdeposition annealing at temperatures higher than 773K. High-resolution transmission electron microscopy, nanobeam electron diffraction, and nanobeam elemental analysis indicated that two regions composed of α-Fe and L10-FePd coexisted in each nanoparticle separated by a diffuse boundary. Magnetic hysteresis measurements using a superconducting quantum interference device magnetometer showed a gradual increase in the saturation magnetization with increasing volume ratio of the α-Fe region, whereas the coercivity decreased with the volume of α-Fe. There were no obvious steps in each magnetization curve. These results indicated the existence of an exchange coupling between the α-Fe and L10-FePd crystallites connected coherently with each other within the nanoparticles. The effects of the α-Fe region size on hard magnetic properties are also discussed.
The Proceedings of Mechanical Engineering Congress, Japan | 2016
Naoki Yoshida; Tadashi Sakamoto; Naoaki Kuwata; Junichi Kawamura; Kazuhisa Sato; Toshiyuki Hashida
The Proceedings of Conference of Tohoku Branch | 2016
Naoki Yoshida; Tadashi Sakamoto; Naoaki Kuwata; Junichi Kawamura; Kazuhisa Sato; Toshiyuki Hashida
The Proceedings of the Materials and Mechanics Conference | 2015
Naoki Yoshida; Tadashi Sakamoto; Naoaki Kuwata; Junichi Kawamura; Kazuhisa Sato; Toshiyuki Hashida
The Proceedings of the Materials and Mechanics Conference | 2014
Kazuhisa Sato; Toshiyuki Hashida; Naoaki Kuwata; Junichi Kawamura
Archive | 2014
M Michael; Junichi Kawamura; Naoaki Kuwata; S Prabaharan
14th Asian Conference on Solid State Ionics (ACSSI 2014) | 2014
Haruka Itabashi; Naoaki Kuwata; Daichi Fujimoto; Yasutaka Matsuda; Junichi Kawamura
14th Asian Conference on Solid State Ionics (ACSSI 2014) | 2014
Arunkumar Dorai; Reiji Takekawa; Nithya Hellar; Naoaki Kuwata; Junichi Kawamura
日本物理学会講演概要集 | 2013
Mohammed Tareque Chowdhury; Reiji Takekawa; Yoshiki Iwai; Naoaki Kuwata; Junichi Kawamura
Meeting abstracts of the Physical Society of Japan | 2013
Naoaki Kuwata; Tatsunori Okawa; Yasutaka Matsuda; Junichi Kawamura
Collaboration
Dive into the Junichi Kawamura's collaboration.
