K
Keiji Enpuku
Researcher at Kyushu University
Publications - 241
Citations - 3523
Keiji Enpuku is an academic researcher from Kyushu University. The author has contributed to research in topics: Magnetic nanoparticles & SQUID. The author has an hindex of 28, co-authored 238 publications receiving 3216 citations.
Papers
More filters
Journal ArticleDOI
Performance of HTS SQUID using resonant coupling of cooled Cu pickup coil
TL;DR: In this article, an HTS SQUID magnetometer was designed and tested using resonant coupling of a copper pickup coil cooled at T ǫ = 77 K. The measured magnetic field noise was 3.3 fT/Hz 1/2 at a resonant frequency of f r  = 10.15  kHz.
Journal ArticleDOI
Synthesis of monodispersed cubic magnetite particles through the addition of small amount of Fe3+ into Fe(OH)2 suspension
TL;DR: In this paper, the Fe 3+ ion was added at the beginning of the synthesis to accelerate the formation of magnetite, control the particle size and improve the monodispersibility.
Journal ArticleDOI
Determination of the effective anisotropy constant of magnetic nanoparticles – Comparison between two approaches
TL;DR: In this article, the Stoner-Wohlfarth model is used to determine the anisotropy field and the descending branch of the magnetic moment-vs-magnetic field (m-H) curve measured on immobilized magnetic nanoparticles.
Journal ArticleDOI
Narrowband magnetic nanoparticle imaging using cooled pickup coil and gradient field
Keiji Enpuku,Takashi Miyazaki,Manabu Morishita,Yuya Tsujita,Masaaki Matsuo,Shi Bai,Teruyoshi Sasayama,Takashi Yoshida +7 more
TL;DR: In this article, a narrowband magnetic particle imaging (MPI) system utilizing third harmonic detection was developed for in-vivo biomedical diagnosis, where the third harmonic signal from the magnetic nanoparticles (MNPs) was detected with a pickup coil and its output was read out with a resonant circuit.
Journal ArticleDOI
Three-dimensional detection of magnetic nanoparticles using a field-free line with weak field gradient and multiple pickup coils
Shohei Hamanaga,Takashi Yoshida,Teruyoshi Sasayama,Ahmed L. Elrefai,Ahmed L. Elrefai,Keiji Enpuku +5 more
TL;DR: In this paper, a weak field gradient of the FFL (0.06-0.13 T m−1) was used to detect magnetic nanoparticles (MNP).