A simple apparatus for the measurement of the Cotton-Mouton effect in particulate suspensions

Author

Wilson, Stephen R. ; Ridler, Peter J. ; Jennings, Barry R.

Author_Institution

School of Electr., Electron. & Inf. Eng., South Bank Univ., London, UK

Volume

33

Issue

5

fYear

1997

fDate

9/1/1997 12:00:00 AM

Firstpage

4349

Lastpage

4358

Abstract

An apparatus has been constructed for the practical realization of the Cotton-Mouton effect in colloidal suspensions. Measurements of the magnetically induced birefringence in such media, using a medium power argon-ion laser operating at a wavelength of 515 nm, have been made for variable magnetic field intensities up to 2.5 T. Data have been recorded on the four pure liquids-nitrobenzene, carbon disulphide, acetone, and benzene. The system has been primarily designed for studies on colloidal media for which the Cotton-Mouton effect can be large, thereby requiring relatively low intensity magnetic fields. Data for bentonite and vermiculite are reported, which demonstrate the ease and validity of such measurements for colloid characterization. These are the first known data on suspensions of vermiculite clay. Furthermore, the influence of any stray Faraday effect is examined

Keywords

colloids; magnetic fluids; magneto-optical effects; suspensions; 2.5 T; 515 nm; Cotton-Mouton effect; acetone; argon-ion laser; bentonite; benzene; carbon disulphide; colloidal suspension; liquid; magnetic birefringence; measurement apparatus; nitrobenzene; particulate system; vermiculite clay; Anisotropic magnetoresistance; Birefringence; Geometrical optics; Magnetic anisotropy; Magnetic field measurement; Optical refraction; Optical variables control; Particle measurements; Perpendicular magnetic anisotropy; Suspensions;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.620445

Filename

620445