Ordering in the dilute weakly anisotropic antiferromagnet Mn0.35Zn0.65F2

Article

关键词: FIELD ISING-MODEL;    SPIN-GLASS BEHAVIOR;    NEUTRON-SCATTERING;    PERCOLATION-THRESHOLD;    RANDOM-EXCHANGE;    SYSTEM FEXZN1-XF2;    ANTI-FERROMAGNETS;    HEAT-CAPACITY;    X-RAY;    CROSSOVER;   

DOI  :  10.1103/PhysRevB.61.14681

来源: SCIE

【 摘 要 】

The highly diluted antiferromagnet Mn0.35Zn0.65F2 has been investigated by neutron scattering in zero field. The Bragg peaks observed below the Neel temperature (T(N)approximate to 10.9 K) indicate stable antiferromagnetic (AF) long-range ordering at low temperature. The critical behavior is compatible with random-exchange Ising model critical exponents (nu approximate to 0.69 and gamma approximate to 1.31), as reported for MnchiZn1-chiF2 With higher chi and for the isostructural compound FechiZn1-chiF2. However, in addition to the Bragg peaks, unusual scattering behavior appears around the (1 0 0) AF Bragg peak below a glassy temperature T(g)approximate to 7.0 K. The glassy region T

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