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】

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