Fe_x Zn_{1-x} F_2磁逾渗阈值附近的中子散射实验与模拟
Neutron scattering experiments and simulations near the magnetic percolation threshold of Fe_x Zn_{1-x} F_2
摘要：
用非弹性中子散射测量了各向异性反铁磁Fe_{1-x} Zn_xF_2（x=0.25和0.31）在磁逾渗阈值浓度x_p=0.25及以上的低温激发。使用本地化的，经典的激发模型，该模型很好地解释了散射实验中观察到的激发的能量和相对强度，模拟了x=0.31的激发。
英文摘要：
The low temperature excitations in the anisotropic antiferromagnetic Fe_{1-x} Zn_x F_2 for x=0.25 and 0.31, at and just above the magnetic percolation threshold concentration x_p=0.25, were measured using inelastic neutron scattering. The excitations were simulated for x=0.31 using a localized, classical excitation model, which accounts well for the energies and relative intensities of the excitations observed in the scattering experiments.
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