Open AccessStratification of ferroparticles caused by gravitational and magnetic fields in soft ferronematics
Author(s) -
D. A. Petrov,
Alexey V. Makurin
Publication year - 2019
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1389/1/012058
Subject(s) - condensed matter physics , magnetic field , stratification (seeds) , gravitation , magnetization , ferromagnetism , impurity , liquid crystal , gravitational field , magnetic nanoparticles , physics , magnetic particle inspection , classical mechanics , materials science , mechanics , nanoparticle , quantum mechanics , seed dormancy , germination , botany , dormancy , biology
In the framework of continuum theory we study the magnetic particles stratification caused by gravitational and magnetic fields in ferronematic, i.e., a highly dispersed suspension of ferroparticles in a nematic liquid crystal. We consider the so-called soft ferronematic, where the coupling energy between the liquid crystal and the particle surfaces is finite, which allows to consider the director and magnetization of the ferronematic as independent variables. We show how under the influence of an external uniform magnetic field due to the segregation effect heavy impurity ferromagnetic particles begin to float up in a lower-density fluid, moving opposite to the gravity field. As an example, several types of suspensions with material parameters corresponding to actually synthesized ferronematics with different ratios between the two competing mechanisms of separation of impurity particles (segregation and gravity) are considered.