The 81st JSAP Autumn Meeting, 2020

Presentation information

Symposium (Oral)

Symposium » Advanced measurement technology realized by superconductor -Recent applications of SQUID-

[10p-Z01-1~6] Advanced measurement technology realized by superconductor -Recent applications of SQUID-

Thu. Sep 10, 2020 1:30 PM - 5:05 PM Z01

Kenji Sakai(Okayama Univ.), Akihiko Kandori(Hitachi)

2:15 PM - 3:00 PM

[10p-Z01-2] Highly sensitive magnetic measurement using supeconducting devices

Keiji Tsukada1 (1.Okayama University)

Keywords:SQUID, magnetometer, magnetic nanoparticles

Many types of magnetic measurement systems using superconducting devices, such as low-temperature (LTS) and high-temperature (HTS) superconducting quantum interference devices (SQUIDs) and superconducting pickup coils, have been developed. Highly sensitive magnetometers that detect the weak magnetic characteristics of biological materials using HTS-SQUID have been developed for other clinical and biological applications. The hybrid-type magnetometer performs three functions: VSM, relaxation measurement, and third-harmonic signal analysis. Aqueous mixtures of ethanol as solvent have been investigated. By analyzing the magnetization curves of magnetic nanoparticles (MNPs), one obtains the magnetic moment distributions of the nanoparticles. A liquid-phase immunoassay method is able to detect the third-harmonic signals of MNPs by an HTS magnetometer.