|
|||||
|
|
Magnetic field induced instabilities of a doped lyotropic hexagonal phase |
|
| Authors: | L. Ramos P. Fabre L. Fruchter |
| Affiliation: | (1) Laboratoire de Physique de la Matière Condensée (CNRS, URA 792), Collège de France, 11 place Marcelin Berthelot, 75231 Paris Cedex 05, France, FR;(2) UMR CNRS-Elf Atochem, 95 rue Danton, 92303 Levallois-Perret Cedex, France, FR;(3) Laboratoire de Physique des Solides, Batiment 510, Université Paris-Sud Orsay, 91405 Orsay Cedex, France, FR |
| Abstract: | A new anisotropic magnetic fluid is obtained using a colloidal suspension of magnetic particles of nanometric size (ferrofluid) as a component of a swollen lyotropic hexagonal phase. This doped hexagonal system exhibits specific behaviors when submitted to a magnetic field of weak intensity. The field-induced instabilities are described and interpreted; they result from a high anisotropy of the magnetic susceptibility of the medium, which is measured. It is finally shown that the magnetic properties of the doped hexagonal phase allows one a determination of the compression modulus of the system. Received 10 February 1998 |
| Keywords: | PACS. 75.50.Mm Magnetic liquids - 82.70.Dd Colloids - 61.30.Gd Orientational order of liquid crystals electric and magnetic field effects on order |
| 本文献已被 SpringerLink 等数据库收录！ | |