Experimental investigation of longitudinal magneto-optic effects in four ferrite ferrofluids in visible-near infrared spectrum

Author

Donatini, F. ; Jamon, D. ; Monin, J. ; Neveu, S.

Author_Institution

LRCCI, Univ. Jean Monnet, Saint-Etienne, France

Volume

35

Issue

5

fYear

1999

fDate

9/1/1999 12:00:00 AM

Firstpage

4311

Lastpage

4317

Abstract

We present an extensive experimental work concerning measurement of longitudinal magneto-optic effects (Faraday rotation and circular dichroism) induced in magnetic liquids. Seven ferrofluid samples allow the study of the influence of numerous parameters: magnetic suspension and carrier liquid characteristics, magnetic field strength (up to 10 kOe) and frequency (dc to 50 kHz), light wavelength (400 to 2000 nm) and, temperature (253 to 373 K). These topics, especially the spectral area, have rarely been studied before. Most of the studies show interesting behaviors and aid in the understanding of magneto-induced phenomena. They also contribute to the conception of new optical applications of ferrofluids: 1) a pure Faraday rotator (free of circular dichroism) obtained by a ferrofluid mixing method and 2) a Faraday light modulator working up to 50 kHz

Keywords

Faraday effect; cobalt compounds; ferrites; magnetic circular dichroism; magnetic fluids; manganese compounds; 0 to 50 kHz; 253 to 373 K; 400 to 2000 nm; CoFe₂O₄; Faraday light modulator; Fe₂O₃; Fe₃O₄; MnFe₂O₄; carrier liquid characteristics; circular dichroism; ferrite ferrofluids; longitudinal magneto-optic effects; magnetic field strength; magnetic suspension; mixing method; pure Faraday rotator; visible-near infrared spectrum; Frequency; Magnetic field measurement; Magnetic levitation; Magnetic liquids; Magnetooptic effects; Optical mixing; Optical modulation; Rotation measurement; Temperature; Wavelength measurement;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.799081

Filename

799081