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We investigated magnetic nanoparticles in a nematic liquid crystal within 2D polygons. The study reveals how polygon shape and magnetic coupling influence system stability and defect formation, impacting multistability.

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Area of Science:

  • Physics
  • Materials Science
  • Soft Matter Physics

Background:

  • Nematic liquid crystals exhibit orientational order.
  • Magnetic nanoparticles introduce spontaneous magnetization.
  • Interactions between nematic order and magnetization are key.

Purpose of the Study:

  • To investigate stable states in 2D magnetic nanoparticle-nematic systems.
  • To analyze the influence of polygon geometry and nemato-magnetic coupling on multistability.
  • To understand the coexistence of domain walls and defects.

Main Methods:

  • Numerical simulations of free energy minimization.
  • Analysis of critical points for stable states.
  • System modeling on two-dimensional regular polygons.

Main Results:

  • Observed coexistence of stable states with domain walls and defects.
  • Positive nemato-magnetic coupling suppressed multistability.
  • Negative nemato-magnetic coupling enhanced multistability.

Conclusions:

  • Polygon shape, size, and coupling strength dictate system multistability.
  • Defect structures are influenced by geometric and magnetic parameters.
  • The system serves as a prototype for studying complex magnetic-nematic interactions.