Noise Characteristics of the Optical Response of Ferrofluids to a Magnetic Field
- Authors: Prokof’ev A.V.1, Pleshakov I.V.1,2, Shlyagin M.3, Agruzov P.M.1, Bibik E.E.4, Kuz’min Y.I.1
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Affiliations:
- Ioffe Physical Technical Institute, Russian Academy of Sciences
- Peter the Great St. Petersburg Polytechnic University
- Centro de Investigación Científica y Educación Superior de Ensenada
- St. Petersburg State Institute of Technology
- Issue: Vol 45, No 8 (2019)
- Pages: 743-745
- Section: Article
- URL: https://journal-vniispk.ru/1063-7850/article/view/208382
- DOI: https://doi.org/10.1134/S1063785019080121
- ID: 208382
Cite item
Abstract
The noise generated by different ferrofluid samples when probed by the fiber-optic method has been investigated. It is shown that switching on a magnetic field significantly increases the noise, which is presumably related to fluctuations accompanying the process of aggregate formation. The dependences of the rms noise on the field strength and probe-light intensity have been experimentally determined. A slow decrease in the rms noise after switching off the magnetic field has been found, which indicates relaxation of the aggregates formed by the field.
Keywords
About the authors
A. V. Prokof’ev
Ioffe Physical Technical Institute, Russian Academy of Sciences
Email: ivanple@yandex.ru
Russian Federation, St. Petersburg, 194021
I. V. Pleshakov
Ioffe Physical Technical Institute, Russian Academy of Sciences; Peter the Great St. Petersburg Polytechnic University
Author for correspondence.
Email: ivanple@yandex.ru
Russian Federation, St. Petersburg, 194021; St. Petersburg, 195251
M. Shlyagin
Centro de Investigación Científica y Educación Superior de Ensenada
Email: ivanple@yandex.ru
Mexico, Ensenada
P. M. Agruzov
Ioffe Physical Technical Institute, Russian Academy of Sciences
Email: ivanple@yandex.ru
Russian Federation, St. Petersburg, 194021
E. E. Bibik
St. Petersburg State Institute of Technology
Email: ivanple@yandex.ru
Russian Federation, St. Petersburg, 190013
Yu. I. Kuz’min
Ioffe Physical Technical Institute, Russian Academy of Sciences
Email: ivanple@yandex.ru
Russian Federation, St. Petersburg, 194021
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