Influence of viscosity on dynamic magnetization of thermally blocked iron oxide nanoparticles characterized by a sensitive AC magnetometer

Influence of viscosity on dynamic magnetization of thermally blocked iron oxide nanoparticles characterized by a sensitive AC magnetometer

In this work, we show that the viscosity of carrier liquid affects the dynamic magnetization of thermally blocked multi-core iron oxide nanoparticles. The core size of the nanoparticles was determined from the magnetization curve measured by a specially developed high-Tc SQUID magnetometer and calcu...

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Main Authors: Mohd Mawardi, Saari, Nazatul Shareena, Suhaimi, Mohd Herwan, Sulaiman, Nurul Akmal, Che Lah, Sakai, Kenji, Kiwa, Toshihiko, Tsukada, Keiji
Format: Article
Language:English
Published: Springer Science+Business Media 2019
Subjects:
QC Physics
TP Chemical technology
Online Access:http://umpir.ump.edu.my/id/eprint/24706/
http://umpir.ump.edu.my/id/eprint/24706/
http://umpir.ump.edu.my/id/eprint/24706/
http://umpir.ump.edu.my/id/eprint/24706/1/Influence%20of%20viscosity%20on%20dynamic%20magnetization%20of%20thermally%20blocked%20.pdf
id ump-24706
recordtype eprints
spelling ump-247062019-11-20T03:48:41Z http://umpir.ump.edu.my/id/eprint/24706/ Influence of viscosity on dynamic magnetization of thermally blocked iron oxide nanoparticles characterized by a sensitive AC magnetometer Mohd Mawardi, Saari Nazatul Shareena, Suhaimi Mohd Herwan, Sulaiman Nurul Akmal, Che Lah Sakai, Kenji Kiwa, Toshihiko Tsukada, Keiji QC Physics TP Chemical technology In this work, we show that the viscosity of carrier liquid affects the dynamic magnetization of thermally blocked multi-core iron oxide nanoparticles. The core size of the nanoparticles was determined from the magnetization curve measured by a specially developed high-Tc SQUID magnetometer and calculated to be 11.7 nm. Using an AC magnetometer developed based on induction coils, the dynamic magnetization of the multi-core iron oxide nanoparticle solution was measured from 3 Hz to 10.48 kHz. Later, we reconstructed of the hydrodynamic size distribution of the particles by assuming a log-normal distribution of particle size in an 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. The reconstructed hydrodynamic sizes showed an average diameter of 130 nm and agreed with the size determined by dynamic light scattering method. In the case of increasing viscosity of the carrier liquids from 0.89 to 8.11 mPa s, the dynamic magnetization peaks of the imaginary component have shifted to a lower frequency region. We showed that the harmonics ratio and phase delay upon the magnetic field excitation at 30 Hz could also be used to determine the viscosity of carrier liquid independently. Springer Science+Business Media 2019-02-02 Article PeerReviewed pdf en http://umpir.ump.edu.my/id/eprint/24706/1/Influence%20of%20viscosity%20on%20dynamic%20magnetization%20of%20thermally%20blocked%20.pdf Mohd Mawardi, Saari and Nazatul Shareena, Suhaimi and Mohd Herwan, Sulaiman and Nurul Akmal, Che Lah and Sakai, Kenji and Kiwa, Toshihiko and Tsukada, Keiji (2019) Influence of viscosity on dynamic magnetization of thermally blocked iron oxide nanoparticles characterized by a sensitive AC magnetometer. Journal of Superconductivity and Novel Magnetism. pp. 1-8. ISSN 1557-1947 https://doi.org/10.1007/s10948-019-5031-6 https://doi.org/10.1007/s10948-019-5031-6
repository_type Digital Repository
institution_category Local University
institution Universiti Malaysia Pahang
building UMP Institutional Repository
collection Online Access
language English
topic QC Physics
TP Chemical technology
spellingShingle QC Physics
TP Chemical technology
Mohd Mawardi, Saari
Nazatul Shareena, Suhaimi
Mohd Herwan, Sulaiman
Nurul Akmal, Che Lah
Sakai, Kenji
Kiwa, Toshihiko
Tsukada, Keiji
Influence of viscosity on dynamic magnetization of thermally blocked iron oxide nanoparticles characterized by a sensitive AC magnetometer
description In this work, we show that the viscosity of carrier liquid affects the dynamic magnetization of thermally blocked multi-core iron oxide nanoparticles. The core size of the nanoparticles was determined from the magnetization curve measured by a specially developed high-Tc SQUID magnetometer and calculated to be 11.7 nm. Using an AC magnetometer developed based on induction coils, the dynamic magnetization of the multi-core iron oxide nanoparticle solution was measured from 3 Hz to 10.48 kHz. Later, we reconstructed of the hydrodynamic size distribution of the particles by assuming a log-normal distribution of particle size in an 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. The reconstructed hydrodynamic sizes showed an average diameter of 130 nm and agreed with the size determined by dynamic light scattering method. In the case of increasing viscosity of the carrier liquids from 0.89 to 8.11 mPa s, the dynamic magnetization peaks of the imaginary component have shifted to a lower frequency region. We showed that the harmonics ratio and phase delay upon the magnetic field excitation at 30 Hz could also be used to determine the viscosity of carrier liquid independently.
format Article
author Mohd Mawardi, Saari
Nazatul Shareena, Suhaimi
Mohd Herwan, Sulaiman
Nurul Akmal, Che Lah
Sakai, Kenji
Kiwa, Toshihiko
Tsukada, Keiji
author_facet Mohd Mawardi, Saari
Nazatul Shareena, Suhaimi
Mohd Herwan, Sulaiman
Nurul Akmal, Che Lah
Sakai, Kenji
Kiwa, Toshihiko
Tsukada, Keiji
author_sort Mohd Mawardi, Saari
title Influence of viscosity on dynamic magnetization of thermally blocked iron oxide nanoparticles characterized by a sensitive AC magnetometer
title_short Influence of viscosity on dynamic magnetization of thermally blocked iron oxide nanoparticles characterized by a sensitive AC magnetometer
title_full Influence of viscosity on dynamic magnetization of thermally blocked iron oxide nanoparticles characterized by a sensitive AC magnetometer
title_fullStr Influence of viscosity on dynamic magnetization of thermally blocked iron oxide nanoparticles characterized by a sensitive AC magnetometer
title_full_unstemmed Influence of viscosity on dynamic magnetization of thermally blocked iron oxide nanoparticles characterized by a sensitive AC magnetometer
title_sort influence of viscosity on dynamic magnetization of thermally blocked iron oxide nanoparticles characterized by a sensitive ac magnetometer
publisher Springer Science+Business Media
publishDate 2019
url http://umpir.ump.edu.my/id/eprint/24706/
http://umpir.ump.edu.my/id/eprint/24706/
http://umpir.ump.edu.my/id/eprint/24706/
http://umpir.ump.edu.my/id/eprint/24706/1/Influence%20of%20viscosity%20on%20dynamic%20magnetization%20of%20thermally%20blocked%20.pdf
first_indexed 2023-09-18T22:37:33Z
last_indexed 2023-09-18T22:37:33Z
_version_ 1777416697044533248

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