论文标题
野外诱导的局部障碍
Field-Induced Partial Disorder in a Shastry-Sutherland Lattice
论文作者
论文摘要
通过单晶中子衍射，在Shastry-Sutherland晶格Band2ZNS5中发现低于TN = 2.9 K的铁磁二聚体的2 Q抗铁磁顺序。磁性顺序可以通过局部ising nd旋转的正交布置来理解，该旋转通过偏振中子标识。沿[1 -1 0]施加了一个场，以探测磁化测量中观察到的子磁过渡。该场分别分别将两个磁性转子分离为对应于传播向量Q1 =（0.5、0.5、0）和Q2 =（-0.5、0.5、0）。每个sublattice在每个单层中都显示带有Neel型布置的条纹顺序。带有Q1的条纹顺序几乎保持不变为6 t，而另一个具有Q2的条纹在临界场HC〜1.7 T下被抑制，表明局部疾病。 HC随温度而变化，并在H-T相图中表现出来，通过测量Band2ZNS5中的磁化构建。
A 2-Q antiferromagnetic order of the ferromagnetic dimers was found below TN = 2.9 K in the Shastry-Sutherland lattice BaNd2ZnS5 by single crystal neutron diffraction. The magnetic order can be understood by the orthogonal arrangement of local Ising Nd spins, identified by polarized neutrons. A field was applied along [1 -1 0] to probe the observed metamagnetic transition in the magnetization measurement. The field decouples two magnetic sublattices corresponding to the propagation vectors q1= (0.5, 0.5, 0) and q2= (-0.5, 0.5, 0), respectively. Each sublattice shows a stripe order with a Neel-type arrangement in each single layer. The stripe order with q1 remains nearly intact up to 6 T, while the other one with q2 is suppressed at a critical field Hc ~1.7 T, indicating a partial disorder. The Hc varies with temperature and is manifested in the H-T phase diagram constructed by measuring the magnetization in BaNd2ZnS5.
