论文标题
弱铁磁体Fe2-Xmnxcral中的非常规的临界行为（0 <x <1）
Unconventional critical behaviour in weak ferromagnets Fe2-xMnxCrAl (0<x<1)
论文作者
论文摘要
关于弱铁磁体Fe2-XMNXCral（0 <x <1）的最新研究表明，在铁磁过渡温度（TC）下方和上方存在簇玻璃（CG）和Griffiths阶段（GP）[（2019）SCI。众议员9 15888]。在这项工作中，已经详细研究了这些不均匀阶段对上述合金系列的临界行为（围绕TC）的影响。对于父合金Fe2cral，γ估计为〜1.34，其位于订购的3D海森贝格模型附近，而获得的β〜0.273的值不属于任何通用类别。随着MN浓度的增长，指数γ和\ b {eta}都增加了，其中γ和β分别分别使用了无序的3D海森伯格模型，并分别订购了3D海森伯格模型。观察到的γ中观察到的偏差和δ的非常规值可以归因于Mn浓度的GP的增量。 β指出的趋势可以归因于CG制度的增量，而MN含量增加。估计指数的自洽性和可靠性通过状态的尺度缩放关系和缩放方程来验证。我们的研究表明，Fe2-Xmnxcral（0 <x <1）合金的关键现象可能属于一个单独的类，并且在任何现有通用模型的框架内均未描述。
Recent studies on weak ferromagnets Fe2-xMnxCrAl (0<x<1) reveal the presence of cluster glass (CG) and Griffiths phase (GP) below and above the ferromagnetic transition temperature (TC) [(2019) Sci. Rep. 9 15888]. In this work, the influence of these inhomogeneous phases on the critical behaviour (around TC) of the above-mentioned series of alloys has been investigated in detail. For the parent alloy Fe2CrAl, γ is estimated as ~ 1.34, which lies near to ordered 3D Heisenberg model, whereas obtained value of β ~ 0.273 does not belong to any universality class. With increment in Mn concentration, both exponents γ and \b{eta} increases, where γ and β approaches disordered 3D Heisenberg model and ordered 3D Heisenberg model, respectively. The observed deviation in γ and unconventional value of δ can be ascribed to the increment in GP with Mn-concentration. The trend noted for β can be attributed to the increment in CG regime with an increase in Mn-content. The self-consistency and reliability of the estimated exponents are verified by the Widom scaling relation and scaling equations of state. Our studies indicate that the critical phenomenon of Fe2-xMnxCrAl (0<x<1) alloys possibly belong to a separate class and is not described within the framework of any existing universal model.
