Analysis of magnetic nanoparticles using second harmonic responses

Saburo Tanaka*, Toshifumi Suzuki, Kazuya Kobayashi, Shu Hsien Liao, Herng-Er Horng, Hong-Chang Yang


研究成果: 雜誌貢獻期刊論文同行評審

3 引文 斯高帕斯(Scopus)


Magnetic particle imaging (MPI) is a new medical imaging technology with a number of potential applications. It is based on utilizing the non-linear magnetization response for magnetic nanoparticles (MNPs). We have proposed a method to improve the detection sensitivity for the magnetization of MNPs, and their imaging technique, based on the detection of a second harmonic of the response using a high Tc SQUID. The advantage of using the second harmonic is that the response can be measured even with small amplitudes. In this paper, superparamagnetic MNPs with different diameters and different compositions of materials were analyzed by this method. In the MNPs, Resovist was found to be almost one order of magnitude larger than that of the other MNPs tested. The magnetic moments of the MNPs were estimated by fitting with the Langevin function to obtain the magnetic moments m of Resovist of 3.62×10−18 [J/T]. The magnetic moment m of Resovist was 7.4 times larger than the other MNPs.

頁(從 - 到)189-191
期刊Journal of Magnetism and Magnetic Materials
出版狀態已發佈 - 2017 10月 15

ASJC Scopus subject areas

  • 電子、光磁材料
  • 凝聚態物理學


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