Peculiar from-Edge-to-Interior Spin Freezing in a Magnetic Dipolar Cube

Abstract

By molecular dynamics simulation, we have investigated classical Heisenberg spins, which are arrayed on a finite simple cubic lattice and interact with each other only by the dipole-dipole interaction, and have found its peculiar it from-Edge-to-interior freezing process. As the temperature is decreased, spins on each edge predominantly start to freeze in a ferromagnetic alignment parallel to the edge around the corresponding bulk transition temperature, then from each edges grow domains with short-range orders similar to the corresponding bulk orders, and the system ends up with a unique multi-domain ground state at the lowest temperature. We interpret this freezing characteristics is attributed to the anisotropic and long-range nature of the dipole-dipole interaction combined with a finite-size effect.

11 pages 5 figures

References in corpus (2)

• Observation of the distribution of molecular spin states by resonant quantum tunneling of the magnetization
• Magnetic hysteresis in Ising-like dipole-dipole model

Cited by in corpus (4)

• Magnetic Properties of 2-Dimensional Dipolar Squares: Boundary Geometry Dependence
• Reformulation of the Stochastic Potential Switching Algorithm and a Generalized Fourtuin-Kasteleyn Representation
• Finite dipolar hexagonal columns on piled layers of triangular lattice
• Spin melting and refreezing driven by uniaxial compression on a dipolar hexagonal plate