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Diffusion-limited deposition of dipolar particles
F de los Santos1, J M Tavares, M Tasinkevych
1Departmento de Electromagnetismo y Física de la Materia, Universidad de Granada, Fuentenueva, 18071 Granada, Spain.
Summary
Monte Carlo simulations reveal that dipolar particle deposits initially form ordered structures. At later stages, thermal effects lead to universal growth, with low temperatures preserving dipolar ordering.
Area of Science:
- Condensed Matter Physics
- Statistical Mechanics
Background:
- Understanding particle deposit formation is crucial in materials science.
- Dipolar interactions significantly influence particle assembly and material properties.
Purpose of the Study:
- To investigate the growth dynamics and resulting structures of dipolar particle deposits.
- To characterize the transition between different growth regimes.
Main Methods:
- Extensive Monte Carlo simulations were employed.
- Simulations explored various interaction strengths and temperatures.
Main Results:
- An initial nonuniversal scaling regime with orientationally ordered deposits was identified.
- Dipolar regime cluster geometry and magnetic properties are tunable via growth conditions.
- At later stages, thermal effects lead to a diffusion-limited universal regime.
- Low temperatures enhance crossover size exponentially, preserving dipolar ordering at T=0.
Conclusions:
- Dipolar particle deposit formation is characterized by distinct initial and later-stage growth regimes.
- Growth conditions and temperature critically control the final structure and magnetic properties.
- A clear transition exists between dipolar-dominated and thermally-dominated growth regimes.