Jiang C Y, Wang Y, Ding Z F, Shu L
State Key Laboratory of Surface Physics, Department of Physics, Fudan University, Shanghai 200438, People's Republic of China.
Shanghai Research Center for Quantum Sciences, Shanghai 201315, People's Republic of China.
J Phys Condens Matter. 2024 May 7;36(31). doi: 10.1088/1361-648X/ad424b.
Interesting behaviors may emerge in the magnetic frustrated materials with significant site-mixing disorder. We present the results of the structural, magnetic susceptibility, and specific heat measurements of DySbZnOwith ∼20%Dy/Zn site-mixing disorder, which results in either a diluted 2D triangular lattice, or an intermediate structure between the kagome and pyrochlore lattice. In addition to the sharp anomaly of the temperature dependence of specific heat atT∼0.35 K, which was attributed to the emergent charge order state for the sample with less disorder, a broad peak atT∼1.5 K, and a small hump belowT∼0.1 K are observed. The measured temperature dependence of specific heat and the Monte Carlo simulation suggest that the magnetic frustration persists despite of a strong site-mixing disorder.
在具有显著位点混合无序的磁阻挫材料中可能会出现有趣的行为。我们展示了对具有约20% Dy/Zn位点混合无序的DySbZnO进行结构、磁化率和比热测量的结果，这导致了稀释的二维三角晶格，或介于 kagome 晶格和烧绿石晶格之间的中间结构。除了比热对温度依赖性在T ∼ 0.35 K处有尖锐异常（这归因于无序程度较小的样品中出现的电荷有序态）外，还观察到在T ∼ 1.5 K处有一个宽峰，以及在T ∼ 0.1 K以下有一个小驼峰。比热的测量温度依赖性和蒙特卡罗模拟表明，尽管存在强烈的位点混合无序，磁阻挫仍然存在。
