Clarke, Daniel and Vallejo Fernandez, Gonzalo orcid.org/0000-0002-4826-1547 (2022) Development of a variable frequency, low current, low volume hysteresis loop tracer. Journal of Magnetism and Magnetic Materials. 169249. ISSN 0304-8853
Abstract
A variable frequency, low current, low cost, high sensitivity magnetometer has been developed. The system uses three MnZn ferrite rods to enhance the maximum field achievable by up to a factor 6 compared to the case where no ferrites are used. The system was tested using a suspension of magnetite nanoparticles in water. The magnetic response of the particles was investigated as a function of the maximum applied field and the frequency of operation. Volumes as low as 7 µl are required to obtain signal to noise ratio of 8(47 kHz)/3(111 kHz) for a fluid with a saturation magnetisation of 1.07 emu/cm3. Fields as high as 420 Oe can be applied by passing a current as low as 2.5 A through the primary coil at all operating frequencies.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2022 Elsevier B.V. All rights reserved. This is an author-produced version of the published paper. Uploaded in accordance with the publisher’s self-archiving policy. Funded by EPSRC via their Impact Acceleration Account (EP/R51181X/1). |
Dates: |
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Institution: | The University of York |
Academic Units: | The University of York > Faculty of Sciences (York) > Physics (York) |
Depositing User: | Pure (York) |
Date Deposited: | 09 Mar 2022 15:20 |
Last Modified: | 16 Oct 2024 18:04 |
Published Version: | https://doi.org/10.1016/j.jmmm.2022.169249 |
Status: | Published online |
Refereed: | Yes |
Identification Number: | 10.1016/j.jmmm.2022.169249 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:184556 |
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Description: 20220224 Loop tracer paper
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