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Development of A Compact and Sensitive AC Magnetometer for Evaluation Of Magnetic Nanoparticles Solution

Nazatul Sharreena, Suhaimi and Mohd Mawardi, Saari and Amir Izzani, Mohamed and Nurul Akmal, Che Lah and Mahendran, Samykano (2017) Development of A Compact and Sensitive AC Magnetometer for Evaluation Of Magnetic Nanoparticles Solution. In: IEEE 8th Control and System Graduate Research Colloquium (ICSGRC 2017), 4-5 August 2017 , Shah Alam, Malaysia. pp. 221-224.. ISBN 978-1-5386-0380-2

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compact and sensitive AC magnetometer is developed for evaluation of magnetic nanoparticles solution. The developed AC magnetometer consists of two main parts; excitation and detection coil systems. A Helmholtz coil configuration was used as the excitation coil to ensure a high homogeneity of excitation magnetic field. To reduce AC resistance due to eddy current effect in the wire of the excitation coil at a high-frequency region, a Litz wire was used. The Litz wire was composed of 60 strands of copper wires with 0.1-mm diameter. For the detection coil, a first order axial differential coil was used so that environmental noises can be canceled. The detection coil consisted of two 1000-turn copper coils and they were connected in series. The fabricated excitation coil showed a high homogeneity along its axis with the high excitation magnetic field. The sensitivity of the developed system increased with respect to frequency. The magnetic noise of the detection unit showed a 1/f noise characteristic and a sensitivity of 10^10 Am2 at 100 Hz was showed by the developed system. To demonstrate the feasibility of the developed system, harmonics of Nickel nanowires was measured. The harmonics generation increased with the increasing amplitude of excitation field. It can be expected that an extremely sensitive characterization of MNP is possible using the developed system.

Item Type: Conference or Workshop Item (Lecture)
Uncontrolled Keywords: AC susceptibility, magnetometer, magnetic nanoparticles, coil
Subjects: Q Science > Q Science (General)
Faculty/Division: Faculty of Electrical & Electronic Engineering
Depositing User: Dr. Mohd Mawardi Saari
Date Deposited: 31 Oct 2017 01:33
Last Modified: 12 Dec 2017 03:23
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