Dynamic magnetization of thermally blocked iron oxide nanoparticles characterized by a sensitive AC magnetometer using a resonant excitation coil

In this study, a development of a sensitive AC magnetometer using a resonant Litz wire coil is reported. Using the AC magnetometer, we characterized the dynamic magnetization of thermally blocked iron oxide nanoparticles in different viscosity of carrier liquid. The multi-core iron oxide nanoparticl...

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Main Authors:	Mohd Mawardi, Saari, Nazatul Shareena, Suhaimi, M. H., Sulaiman, Nurul Akmal, Che Lah, Kenji, Sakai, Toshihiko, Kiwa, Keiji, Tsukada
Format:	Conference or Workshop Item
Language:	English
Published:	2018
Subjects:	TK Electrical engineering. Electronics Nuclear engineering TS Manufactures
Online Access:	http://umpir.ump.edu.my/id/eprint/21410/ http://umpir.ump.edu.my/id/eprint/21410/1/Dynamic%20magnetization%20of%20thermally%20blocked%20iron%20oxide%20nanoparticles.pdf

id	ump-21410
recordtype	eprints
spelling	ump-214102018-06-29T04:54:43Z http://umpir.ump.edu.my/id/eprint/21410/ Dynamic magnetization of thermally blocked iron oxide nanoparticles characterized by a sensitive AC magnetometer using a resonant excitation coil Mohd Mawardi, Saari Nazatul Shareena, Suhaimi M. H., Sulaiman Nurul Akmal, Che Lah Kenji, Sakai Toshihiko, Kiwa Keiji, Tsukada TK Electrical engineering. Electronics Nuclear engineering TS Manufactures In this study, a development of a sensitive AC magnetometer using a resonant Litz wire coil is reported. Using the AC magnetometer, we characterized the dynamic magnetization of thermally blocked iron oxide nanoparticles in different viscosity of carrier liquid. The multi-core iron oxide nanoparticles have a mean core size of 12 nm. The magnetization curve was measured by a specially developed high-Tc SQUID magnetometer. Using the measured dynamic magnetization, we then reconstructed the distribution of the hydrodynamic size of the particles by assuming a log-normal distribution of particle size in a Debye function of magnetic response. The AC susceptibility model by Shliomis and Stepanov which accounts for anisotropic directions of the easy axes of magnetic nanoparticles with respect to the excitation field direction, was used. The reconstructed hydrodynamic sizes agreed with the size determined from dynamic light scattering method. The peak of imaginary component of magnetization shifted to lower frequency region as viscosity increased. We showed that harmonics ratio and the lagging phase can be used to independently determine the viscosity of carrier liquid. A highly sensitive exploration of dynamics properties of magnetic nanoparticles can be expected by using the developed system. 2018 Conference or Workshop Item NonPeerReviewed pdf en http://umpir.ump.edu.my/id/eprint/21410/1/Dynamic%20magnetization%20of%20thermally%20blocked%20iron%20oxide%20nanoparticles.pdf Mohd Mawardi, Saari and Nazatul Shareena, Suhaimi and M. H., Sulaiman and Nurul Akmal, Che Lah and Kenji, Sakai and Toshihiko, Kiwa and Keiji, Tsukada (2018) Dynamic magnetization of thermally blocked iron oxide nanoparticles characterized by a sensitive AC magnetometer using a resonant excitation coil. In: 6th Edition of International Conference On Superconductivity and Magnetism (ICSM2018), 29 April - 4 May 2018 , Premier Palace Hotel Beldibi, Antalya, Turkey. pp. 1-11.. (Unpublished)
repository_type	Digital Repository
institution_category	Local University
institution	Universiti Malaysia Pahang
building	UMP Institutional Repository
collection	Online Access
language	English
topic	TK Electrical engineering. Electronics Nuclear engineering TS Manufactures
spellingShingle	TK Electrical engineering. Electronics Nuclear engineering TS Manufactures Mohd Mawardi, Saari Nazatul Shareena, Suhaimi M. H., Sulaiman Nurul Akmal, Che Lah Kenji, Sakai Toshihiko, Kiwa Keiji, Tsukada Dynamic magnetization of thermally blocked iron oxide nanoparticles characterized by a sensitive AC magnetometer using a resonant excitation coil
description	In this study, a development of a sensitive AC magnetometer using a resonant Litz wire coil is reported. Using the AC magnetometer, we characterized the dynamic magnetization of thermally blocked iron oxide nanoparticles in different viscosity of carrier liquid. The multi-core iron oxide nanoparticles have a mean core size of 12 nm. The magnetization curve was measured by a specially developed high-Tc SQUID magnetometer. Using the measured dynamic magnetization, we then reconstructed the distribution of the hydrodynamic size of the particles by assuming a log-normal distribution of particle size in a Debye function of magnetic response. The AC susceptibility model by Shliomis and Stepanov which accounts for anisotropic directions of the easy axes of magnetic nanoparticles with respect to the excitation field direction, was used. The reconstructed hydrodynamic sizes agreed with the size determined from dynamic light scattering method. The peak of imaginary component of magnetization shifted to lower frequency region as viscosity increased. We showed that harmonics ratio and the lagging phase can be used to independently determine the viscosity of carrier liquid. A highly sensitive exploration of dynamics properties of magnetic nanoparticles can be expected by using the developed system.
format	Conference or Workshop Item
author	Mohd Mawardi, Saari Nazatul Shareena, Suhaimi M. H., Sulaiman Nurul Akmal, Che Lah Kenji, Sakai Toshihiko, Kiwa Keiji, Tsukada
author_facet	Mohd Mawardi, Saari Nazatul Shareena, Suhaimi M. H., Sulaiman Nurul Akmal, Che Lah Kenji, Sakai Toshihiko, Kiwa Keiji, Tsukada
author_sort	Mohd Mawardi, Saari
title	Dynamic magnetization of thermally blocked iron oxide nanoparticles characterized by a sensitive AC magnetometer using a resonant excitation coil
title_short	Dynamic magnetization of thermally blocked iron oxide nanoparticles characterized by a sensitive AC magnetometer using a resonant excitation coil
title_full	Dynamic magnetization of thermally blocked iron oxide nanoparticles characterized by a sensitive AC magnetometer using a resonant excitation coil
title_fullStr	Dynamic magnetization of thermally blocked iron oxide nanoparticles characterized by a sensitive AC magnetometer using a resonant excitation coil
title_full_unstemmed	Dynamic magnetization of thermally blocked iron oxide nanoparticles characterized by a sensitive AC magnetometer using a resonant excitation coil
title_sort	dynamic magnetization of thermally blocked iron oxide nanoparticles characterized by a sensitive ac magnetometer using a resonant excitation coil
publishDate	2018
url	http://umpir.ump.edu.my/id/eprint/21410/ http://umpir.ump.edu.my/id/eprint/21410/1/Dynamic%20magnetization%20of%20thermally%20blocked%20iron%20oxide%20nanoparticles.pdf
first_indexed	2023-09-18T22:31:24Z
last_indexed	2023-09-18T22:31:24Z
_version_	1777416309755084800

Dynamic magnetization of thermally blocked iron oxide nanoparticles characterized by a sensitive AC magnetometer using a resonant excitation coil

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