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journal article·2024-01-01Open access

Harmonic response of Gd-doped Mn-ferrite nanoparticles under AC magnetic field and optimization of Gd doping for MPI applications

T. Sakamoto, K. Nii, Y. Fujita, T. Moriwaki, H. Amano, R. Abe, Y. Ichiyanagi

AIP Advances· Volume 14· Issue 1
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Source abstract

Abstract

This study synthesized Gd-doped Mn-ferrite nanoparticles for magnetic particle imaging (MPI) applications with doping levels (x) of 0, 0.05, 0.07, and 0.10. Analyses using X-ray diffraction measurements unequivocally confirmed the presence of a spinel-type crystal structure in the synthesized particles and X-ray absorption fine-structure spectroscopy confirmed the incorporation of Gd atoms in place of Mn within the crystal lattice. Magnetization and harmonic measurements under an AC magnetic field revealed that particles with a high initial permeability and low coercivity showed a high response intensity. Notably, particles possessing a Gd doping level of x = 0.07 displayed the highest response and were considered promising as MPI materials.
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Research context

Nanomaterials

OpenAlex topics: Characterization and Applications of Magnetic Nanoparticles · Magnetic Properties and Synthesis of Ferrites · Iron oxide chemistry and applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Department of Physics, Graduate School of Engineering Science, Yokohama National University 1 , Yokohama, Kanagawa 240-8501, Japan

Department of National Environment, Graduate School of Environment and Information Science, Yokohama National University 2 , Yokohama, Kanagawa 240-8501, Japan

Funding

JST-Mirai Program · Japan Society for the Promotion of Science · Japan Agency for Medical Research and Development · Institute of Innovative Research, Tokyo Institute of Technology · High Energy Accelerator Research Organization

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