Spin-glass and antiferromagnet critical behavior in a diluted fee antiferromagnet | |
Article | |
关键词: ISING ANTI-FERROMAGNET; CENTERED CUBIC LATTICE; MONTE-CARLO; PHASE-TRANSITIONS; MAGNETIC-SUSCEPTIBILITY; POTTS-MODEL; SYSTEMS; CD1-XMNXTE; DYNAMICS; ORDER; | |
DOI : 10.1103/PhysRevB.53.6543 | |
来源: SCIE |
【 摘 要 】
We report on a Monte Carlo study of a diluted Ising antiferromagnet on a fee 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 greater than or equal to 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 Zn1-pMnpTe.
【 授权许可】
Free