TY - GEN
T1 - A sensitive AC magnetometer using a resonant excitation coil for magnetic fluid characterization in nonlinear magnetization region
AU - Saari, Mohd Mawardi
AU - Suhaimi, Nazatul Sharreena
AU - Lah, Nurul Akmal Che
AU - Sakai, Kenji
AU - Kiwa, Toshihiko
AU - Tsukada, Keiji
N1 - Funding Information:
This work was supported by Ministry of Higher Education of Malaysia under grant number of RDU 160115 and Research Management Center of Universiti Malaysia Pahang under grant number of RDU 170377.
Publisher Copyright:
© 2018 IEEE.
PY - 2018/10/24
Y1 - 2018/10/24
N2 - In order to tailor the magnetic nanoparticles (MNPs) properties for intended applications, it is crucial to unravelling their fundamental dynamics with respect to excitation magnetic field. In this work, we report on the development of a sensitive AC magnetometer using a resonant excitation coil for this purpose. The excitation coil fabricated from a Litz wire is connected to a capacitor network to reduce the impedance of the circuit efficiently. The high efficiency showed by the excitation coil enables investigation of MNP's dynamics in the nonlinear magnetization region. We demonstrate the sensitivity of the developed system by measuring the harmonics distribution of multi-core iron oxide nanoparticles suspended in solutions with the iron concentration down to 300 ng/ml. We experimentally show that the first harmonic component is not entirely 'transparent' to the diamagnetic background of the carrier liquid compared to the higher harmonics. We also demonstrate the complex magnetization measurement of the iron oxide nanoparticles in solution and immobilized states from 3 Hz to 18 kHz. A highly sensitive exploration of MNPs' dynamics can be expected using the developed AC magnetometer.
AB - In order to tailor the magnetic nanoparticles (MNPs) properties for intended applications, it is crucial to unravelling their fundamental dynamics with respect to excitation magnetic field. In this work, we report on the development of a sensitive AC magnetometer using a resonant excitation coil for this purpose. The excitation coil fabricated from a Litz wire is connected to a capacitor network to reduce the impedance of the circuit efficiently. The high efficiency showed by the excitation coil enables investigation of MNP's dynamics in the nonlinear magnetization region. We demonstrate the sensitivity of the developed system by measuring the harmonics distribution of multi-core iron oxide nanoparticles suspended in solutions with the iron concentration down to 300 ng/ml. We experimentally show that the first harmonic component is not entirely 'transparent' to the diamagnetic background of the carrier liquid compared to the higher harmonics. We also demonstrate the complex magnetization measurement of the iron oxide nanoparticles in solution and immobilized states from 3 Hz to 18 kHz. A highly sensitive exploration of MNPs' dynamics can be expected using the developed AC magnetometer.
KW - AC susceptibility
KW - Harmonics
KW - Magnetic nanoparticles
KW - Magnetometer
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U2 - 10.1109/INTMAG.2018.8508784
DO - 10.1109/INTMAG.2018.8508784
M3 - Conference contribution
AN - SCOPUS:85057474068
T3 - 2018 IEEE International Magnetic Conference, INTERMAG 2018
BT - 2018 IEEE International Magnetic Conference, INTERMAG 2018
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2018 IEEE International Magnetic Conference, INTERMAG 2018
Y2 - 23 April 2018 through 27 April 2018
ER -