临界自旋玻璃关联长度的实验测定
Experimental Determination of the Critical Spin Glass Correlation Length
摘要：
测量了单晶CuMn（6 $\%$）自旋玻璃样品的热剩磁（TRM）衰减，系统地绘制了特征时间尺度$tw_{eff}$在$T_g$附近的快速衰减图.使用$tw_{eff}$来确定在等待时间期间相关性增长的长度尺度，$ξ_{TRM}$，（在数值研究和实验中观察到的），我们观察到$ξ_{TRM}$在自旋玻璃相中的增长，然后快速减少到非常接近$T_g$。我们解释这种减少$ξ_{TRM}$，所有的等待时间，作为受关键的相关长度尺度$ξ_{crit}=a(T-T_c)^{-ν}$。
英文摘要：
Measuring ThermoRemanent Magnetization (TRM) decays on a single crystal CuMn(6$\%$) spin glass sample, we have systematically mapped the rapid decrease of the characteristic timescale $tw_{eff}$ near $T_g$. Using $tw_{eff}$ to determine the length scale of the growth of correlations during the waiting time, $ξ_{TRM}$, (observed in both numerical studies and experiment), we observe both growth of $ξ_{TRM}$ in the spin glass phase and then a rapid reduction very close to $T_g$. We interpret this reduction in $ξ_{TRM}$, for all waiting times, as being governed by the critical correlation length scale $ξ_{crit}=a(T-T_c)^{-ν}$.
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