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首页> 外文期刊>Physica status solidi, B. Basic research >EFFECT OF INTERLAYER COUPLING ON NEEL, TEMPERATURE IN COPPER OXIDE BASED ANTIFERROMAGNETS
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EFFECT OF INTERLAYER COUPLING ON NEEL, TEMPERATURE IN COPPER OXIDE BASED ANTIFERROMAGNETS

机译:层间耦合对基于氧化铜的反铁磁网中Neel,温度的影响

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摘要

The role of interlayer coupling (J(perpendicular to) ) on the Neel temperature of (1-2-3) compounds is studied by taking the three-dimensional anisotropic Heisenberg antiferromagnetic model. The two-sublattice model of the antiferromagnet is considered. The double-time Green function technique is employed and the higher-order Green functions are decoupled using the Callen decoupling approximation. The Neel temperature (T-N) for YBa2Cu3O6+x (1-2-3) compounds as a function of doping concentrations (x) is estimated. The intraplanar coupling strength (J(parallel to)) is treated as a constant throughout the numerical calculations. The theoretical results are compared with that of the random phase approximation (RPA) and existing experimental results. [References: 15]
机译:通过三维各向异性海森堡反铁磁模型研究了层间耦合(J(垂直于))对(1-2-3)化合物的尼尔温度的作用。考虑反铁磁体的两个子格模型。采用了二次格林函数技术,并使用卡伦解耦近似对高阶格林函数进行解耦。估算了YBa2Cu3O6 + x(1-2-3)化合物的Neel温度(T-N)作为掺杂浓度(x)的函数。在整个数值计算中,平面内耦合强度(J(平行于))被视为一个常数。将理论结果与随机相位近似(RPA)的结果和现有的实验结果进行比较。 [参考:15]

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