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A ferronematic slab in external magnetic fields

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Abstract

The behavior of a uniformly magnetized ferronematic slab is investigated numerically in a situation in which an external magnetic field is applied parallel and antiparallel, respectively, to its initial magnetization direction. The employed numerical method allows one to determine hysteresis curves from which a critical magnetic field strength (i.e., the one at which the ferronematic sample becomes distorted) as a function of the system parameters can be inferred. Two possible mechanisms of switching the magnetization by applying a magnetic field in the antiparallel direction are observed and characterized in terms of the coupling constant between the magnetization and the nematic director and in terms of the coupling strength of the nematic liquid crystal and the walls of the slab. Suitably prepared walls allow one to combine both switching mechanisms in one setup, such that one can construct a cell, the magnetization of which can be reversibly switched off.

Graphical abstract: A ferronematic slab in external magnetic fields

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Publication details

The article was received on 05 Sep 2018, accepted on 09 Nov 2018 and first published on 28 Nov 2018


Article type: Paper
DOI: 10.1039/C8SM01813H
Citation: Soft Matter, 2018, Advance Article
  • Open access: Creative Commons BY license
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    A ferronematic slab in external magnetic fields

    G. Zarubin, M. Bier and S. Dietrich, Soft Matter, 2018, Advance Article , DOI: 10.1039/C8SM01813H

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