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Title: Optical patterning of magnetic domains and defects in ferromagnetic liquid crystal colloids

Journal Article · · Applied Physics Letters
DOI:https://doi.org/10.1063/1.4928552· OSTI ID:1225330
 [1];  [1];  [2]
  1. Univ. of Colorado, Boulder, CO (United States)
  2. Univ. of Colorado, Boulder, CO (United States); National Renewable Energy Lab., Boulder, CO (United States)

A promising approach in designing composite materials with an unusual physical behavior combines solid nanostructures and orientationally ordered soft matter at the mesoscale. Such composites can not only inherit properties of their constituents but also can exhibit emergent behavior such as ferromagnetic ordering of colloidal metal nanoparticles forming mesoscopic magnetization domains when dispersed in a nematic liquid crystal. Here, we demonstrate the optical patterning of domain structures and topological defects in such ferromagnetic liquid crystal colloids, which allows for altering their response to magnetic fields. Furthermore, our findings reveal the nature of the defects in this soft matter system which is different as compared to non-polar nematics and ferromagnets alike.

Research Organization:
National Renewable Energy Laboratory (NREL), Golden, CO (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE); National Science Foundation (NSF)
Grant/Contract Number:
AC36-08GO28308; DMR-1420736
OSTI ID:
1225330
Report Number(s):
NREL/JA-5900-65110
Journal Information:
Applied Physics Letters, Vol. 107, Issue 7; Related Information: Applied Physics Letters; ISSN 0003-6951
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 25 works
Citation information provided by
Web of Science

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Cited By (12)

Read on Demand Images in Laser-Written Polymerizable Liquid Crystal Devices journal July 2018
Dynamic Spirals of Nanoparticles in Light‐Responsive Polygonal Fields journal August 2019
A ferronematic slab in external magnetic fields journal January 2018
Biaxial ferromagnetic liquid crystal colloids journal September 2016
Ferromagnetic nematic liquid crystals journal January 2017
Tailoring surface patterns to direct the assembly of liquid crystalline materials journal January 2019
Dynamic Magneto-optic Coupling in a Ferromagnetic Nematic Liquid Crystal journal September 2017
Field-controlled structures in ferromagnetic cholesteric liquid crystals journal October 2017
Optically enriched and guided dynamics of active skyrmions journal January 2020
Dynamic Spirals of Nanoparticles in Light-Responsive Polygonal Fields preprint April 2019
Dynamic Spirals of Nanoparticles in Light-Responsive Polygonal Fields preprint April 2019
Optically enriched and guided dynamics of active skyrmions text January 2019