NiFe₂O₄ Ferrofluid to Detect Magnetic Field Using Microfiber Interferometry

Magnetic field sensor operating for high magnetic fields plays a critical role in non-invasive medical diagnostic applications such as magnetic resonance imaging. Considering this fact, a microfiber-based magnetometer functioning for a large dynamic range of magnetic field actuated via NiFe 2 O 4 fe...

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Bibliographic Details
Published in:IEEE sensors journal 2022-03, Vol.22 (5), p.4014-4021
Main Authors: Khamari, Subodh, Kumar, Ashish, Mohapatra, Niharika, Jha, Rajan
Format: Article
Language:English
Subjects:
anisotropy
Current sources
Ferrofluids
Magnetic field measurement
Magnetic fields
magnetic fluid
Magnetic flux
Magnetic liquids
Magnetic properties
Magnetic resonance imaging
Magnetic sensors
Magnetism
Magnetometer
Magnetometers
microfiber
Microfibers
nanofluid
Nanoparticles
Nickel ferrites
optical fiber sensor
Optical fiber sensors
Optical interferometry
Optical properties
Sensors
Sol-gel processes
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Summary:Magnetic field sensor operating for high magnetic fields plays a critical role in non-invasive medical diagnostic applications such as magnetic resonance imaging. Considering this fact, a microfiber-based magnetometer functioning for a large dynamic range of magnetic field actuated via NiFe 2 O 4 ferrite fluid is presented and proposed. The relevant technical aspects of the present research and current limitations also have been reviewed. NiFe 2 O 4 based nanoparticles with an average estimated particle size (using Debye-Scherrer's formula) of 37 nm have been synthesized by sol-gel method. Various characteristic techniques have been exercised to investigate their structural (morphological), optical, and magnetic properties. The proposed sensing probe optimized for a high range of applied magnetic field intensity up to ~0.6 T has been fabricated using only 2% of the volume concentration of ferrite fluids nanoparticles surrounding the interferometer. The reported sensor exhibits a maximum sensitivity of 18 pm/mT due to alterations in the interference dip wavelength. The operational range of the proposed sensing scheme can be enhanced substantially using a better current source.
ISSN:1530-437X
1558-1748
DOI:10.1109/JSEN.2022.3142039