"

Cookies ussage consent

Our site saves small pieces of text information (cookies) on your device in order to deliver better content and for statistical purposes. You can disable the usage of cookies by changing the settings of your browser. By browsing our site without changing the browser settings you grant us permission to store that information on your device.

I agree, do not show this message again.

ON MICROMETRIC PATTERN FORMATION IN MAGNETIC FLUIDS THIN FILMS

G. Fosa1, G. Strat1, R. Badescu1, Gh. Calugaru1,*

Affiliation

  1. “Gh. Asachi” Technical University, Department of Physics, 63 Mangeron Blvd., Iasi-700050, Romania

Abstract

The patterns of transformer-oil magnetic fluid films in applied parallel and perpendicular magnetic fields were studied. For the magnetic field applied parallel to film some interesting optical phenomena have been observed, such as birefringence and dichroism. We report some measurement results on time dependence of the transmittances both of ordinary rays and of extraordinary rays passing perpendicular through the sample, after suddenly applying or removing the magnetic field. For the magnetic field applied transversally to film we observed and studied by optical microscopy the hexagonal structure in a weaker perpendicular field, and the labyrinthine pattern in a stronger perpendicular field..

Keywords

Magnetic fluids, Agglomeration, Anisotropy, Transmittance, Diffraction.

Submitted at: April 26, 2004
Accepted at: June 10, 2004

Citation

G. Fosa, G. Strat, R. Badescu, Gh. Calugaru, ON MICROMETRIC PATTERN FORMATION IN MAGNETIC FLUIDS THIN FILMS, Journal of Optoelectronics and Advanced Materials Vol. 6, Iss. 2, pp. 655-660 (2004)