A sensitive magnetometer utilizing high-Tc SQUID for magnetic property characterization

Saari, M. M. and Sakai, Kenji and Kiwa, Toshihiko and Tsukada, Keiji (2021) A sensitive magnetometer utilizing high-Tc SQUID for magnetic property characterization. Microsystem Technologies, 27 (9). pp. 3413-3420. ISSN 0946-7076. (Published)

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Abstract

Magnetometer is one of the indispensable instruments utilized for the magnetic property characterization of materials, where it evaluates the magnetic response originated from the materials. The non-invasive magnetic technique has promoted magnetometer to be utilized in new applications such as in biomedical applications. In this work, we report the development of a magnetometer utilizing a high critical temperature superconducting quantum interference device (high-Tc SQUID) and a flux transformer composed of an induction coil. The high-Tc SQUID is used in order to realize high sensitivity, compact, and low-running cost magnetometer for biomedical applications such as characterization of magnetic nanoparticles. A first-order planar gradiometer with a compensation coil was used as the detection coil to achieve high sensitivity and cancellation factor. We fabricate an electromagnet with primary and small secondary excitation coils to enable a wide range of the excitation magnetic field with a high resolution. To reduce the magnetic field’s drift, we apply a digital feedback program to control the electrical current of the electromagnet. The performance of the developed system is demonstrated by measuring the magnetization curve and AC responses of an iron oxide composite sample. The sensitivity showed by the developed magnetometer reveals its potential for a highly sensitive magnetic property characterization.

Item Type:	Article
Additional Information:	Indexed by Scopus
Uncontrolled Keywords:	Electromagnets; Iron oxides; Magnetic fields; Magnetic properties; Magnetometers; Medical applications; Molluscs; Quantum interference devices; Shellfish; SQUIDs; Superconducting coils
Subjects:	Q Science > QC Physics T Technology > TK Electrical engineering. Electronics Nuclear engineering
Faculty/Division:	Faculty of Electrical & Electronic Engineering
Depositing User:	Dr. Mohd Mawardi Saari
Date Deposited:	03 Aug 2022 03:57
Last Modified:	03 Aug 2022 03:57
URI:	http://umpir.ump.edu.my/id/eprint/33838
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