Phases of anisotropic dipolar antiferromagnets
arXiv:cond-mat/0512297 · doi:10.1103/PhysRevB.73.024412
Abstract
We study systems of classical magnetic dipoles on simple cubic lattices with dipolar and antiferromagnetic exchange interactions. By analysis and Monte Carlo (MC) simulations, we find how the antiferromagnetic phases vary with uniaxial and fourfold anisotropy constants, C and D, as well as with exchange strength J. We pay special attention to the spin reorientation (SR) phase, and exhibit in detail the nature of its broken symmetries. By mean field theory and by MC, we also obtain the ratio of the higher ordering temperature to the SR transition temperature, and show that it depends mainly on D/C, and rather weakly on J. We find a reverse SR transition.
10 LaTeX pages, 14 eps figures. Submitted to PRB on 03 October 2005. Accepted on 13 December 2005
References in corpus (6)
- Quantum Coherence in an Exchange-Coupled Dimer of Single-Molecule Magnets
- Theory of the Magnetic phase diagram of LiHoF
- Quantum tunneling in a three dimensional network of exchange coupled single-molecule magnets
- Magnetic long-range order induced by quantum relaxation in single-molecule magnets
- Long-range ferromagnetic dipolar ordering of high-spin molecular clusters
- Long-range ferromagnetism of Mn12 acetate single-molecule magnets under a transverse magnetic field