Spin Glass and Antiferromagnetic Behaviour in a Diluted fcc Antiferromagnet

Abstract

We report on a Monte Carlo study of a diluted Ising antiferromagnet on a fcc lattice. This is a typical model example of a highly frustrated antiferromagnet, and we ask, whether sufficient random dilution of spins does produce a spin glass phase. Our data strongly indicate the existence of a spin glass transition for spin--concentration $p<0.75$: We find a divergent spin glass susceptibility and a divergent spin glass correlation length, whereas the antiferromagnetic correlation length saturates in this regime. Furthermore, we find a first order phase transition to an antiferromagnet for $1\ge p>0.85$, which becomes continuous in the range $0.85>p>0.75$. Finite size scaling is employed to obtain critical exponents. We compare our results with experimental systems as diluted frustrated antiferromagnets as $\mathrm{Z}{\mathrm{n}}_{1-\mathrm{p}}\mathrm{M}{\mathrm{n}}_{\mathrm{p}}\mathrm{Te}$.

29 pages (revtex) and 10 figures uuencoded and Z-compressed

References in corpus (2)

• Phase Transition in the Three-Dimensional $\pm J$ Ising Spin Glass
• On the 3d Ising Spin Glass

Cited by in corpus (6)

• Long Range Order at Low Temperature in Dipolar Spin Ice
• Ising antiferromagnet on the Archimedean lattices
• Phase Diagram of a Diluted Triangular Lattice Ising Antiferromagnet in a Field
• Low-temperature spin-glass behaviour in a diluted dipolar Ising system
• Spin Glass Ordering in Diluted Magnetic Semiconductors: a Monte Carlo Study
• Nonlinear and spin-glass susceptibilities of three site-diluted systems