论文标题
部分可观测时空混沌系统的无模型预测
Transition between long and short-range helical orders in mixed B20 cubic helimagnets
论文作者
论文摘要
考虑了具有强（令人沮丧的）缺陷键的B20 Helimagnet模型。单缺陷提供了螺旋磁顺序的偶极场样失真。在有限的缺陷键浓度下，螺旋矢量可以校正其在纯系统中的值。此外，已经表明，足够的强烈缺陷，但较小的浓度能够破坏远距离顺序，并以短距离的螺旋顺序将系统驱动到相位。有人认为，开发的方法允许描述Mn $ _ {1-x} $ fe $ _x $ si和mn $ _ {1-x} $ co $ _x $ _x $ si化合物中的主要实验观测。
A model of B20 helimagnet with strong (frustrating) defect bonds is considered. Single defect provides dipolar field-like distortion of the helical magnetic ordering. At finite defect bond concentrations, the spiral vector acquires correction to its value in the pure system. Moreover, it is shown that the strong defects of sufficient but small concentration are able to destroy long-range order driving the system to the phase with short-range helical ordering. It is argued that the developed approach allows describing main experimental observations in Mn$_{1-x}$Fe$_x$Si and Mn$_{1-x}$Co$_x$Si compounds.
