Thermodynamics of a binary monolayer of Ising dipolar particles

Masaru Suzuki, F. Kun, Satoshi Yukawa, Nobuyasu Ito

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Thermodynamic behavior of a binary monolayer of Ising dipolar particles is studied using numerical simulation. The thermal equilibrium states of the system under the canonical ensemble are observed. The boundary of gas-liquid phase is determined from the power law growth of critical clusters. But that temperature is slightly lower than that of solidification. So it means that this system does not have a liquid phase. This system is also studied theoretically using virial expansion. The coefficients obtained from standard virial expansion, however, do not show any phase transition. An improvement of the virial expansion is also given by taking tetragonal local structures of alternate types of particles into consideration. Such structures are observed within critical clusters of our simulation. The thermodynamic state equation obtained from the improved virial expansion agrees well with the simulation result, and this expansion also shows that the critical point is almost at the same temperature with solidification. These results suggest that not simply the strength of attractive force by the dipole interaction but a typical configuration caused by the binary condition of this system plays a dominant role in phase transitions.

Original languageEnglish
Article number051116
JournalPhysical Review E - Statistical, Nonlinear, and Soft Matter Physics
Volume76
Issue number5
DOIs
Publication statusPublished - Nov 15 2007

Fingerprint

Ising
Thermodynamics
Binary
thermodynamics
expansion
Solidification
solidification
liquid phases
Phase Transition
Liquid
Canonical Ensemble
simulation
Thermal Equilibrium
Local Structure
State Equation
Equilibrium State
Alternate
Dipole
Critical point
critical point

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Condensed Matter Physics
  • Statistical and Nonlinear Physics
  • Mathematical Physics

Cite this

Thermodynamics of a binary monolayer of Ising dipolar particles. / Suzuki, Masaru; Kun, F.; Yukawa, Satoshi; Ito, Nobuyasu.

In: Physical Review E - Statistical, Nonlinear, and Soft Matter Physics, Vol. 76, No. 5, 051116, 15.11.2007.

Research output: Contribution to journalArticle

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