Frederiks transition in magnetic suspensions / Zubarev AY,Iskakova LY // COLLOID JOURNAL. - 1999. - V. 61, l. 1. - P. 45-59.

ISSN/EISSN:

1061-933X / нет данных

Type:

Article

Abstract:

The Frederiks effect was studied in the suspension of nematically ordered needlelike ferromagnetic particles with account for their steric and magnetic interactions. It was revealed that the critical field increases with particle concentration and the degree of particle extension, whereas the amplitude of nematic structure deformation decreases. The enhancement of magnetic interparticle interaction results in a decrease of the critical field and in an increase in deformation amplitude. The Frederiks effect was accompanied by particle segregation in the slit center, which was larger the stronger the particle magnetic interaction was. Calculations showed that under definite conditions, the Frederiks effect in the suspensions of hard polar particles may be implemented as a first-order rather than a second-order transition. The initial transition stage was studied. It was demonstrated that if the magnetic field exceeded a certain critical value (larger than the critical field of equilibrium transition), the Frederiks effect was accompanied by the appearance of noneqiulibrium periodic structures with different orientations of the nematic director. A similar effect was observed when the permanent magnetic field was reversed.

Author keywords:

RHEOLOGICAL PROPERTIES; LIQUID-CRYSTALS; NEMATICS; SYSTEM; FIELD

DOI:

нет данных

Web of Science ID:

ISI:000078888600008

Соавторы в МНС:

Другие поля

Поле	Значение
Month	JAN-FEB
Publisher	MAIK NAUKA/INTERPERIODICA
Address	C/O PLENUM/CONSULTANTS BUREAU 233 SPRING ST, NEW YORK, NY 10013 USA
Language	English
Keywords-Plus	RHEOLOGICAL PROPERTIES; LIQUID-CRYSTALS; NEMATICS; SYSTEM; FIELD
Research-Areas	Chemistry
Web-of-Science-Categories	Chemistry, Physical
ResearcherID-Numbers	Zubarev, Adrey/B-4752-2014
Number-of-Cited-References	23
Usage-Count-Since-2013	2
Journal-ISO	Colloid J.
Doc-Delivery-Number	171XB