论文标题
在la $ _ {1.5} $（sr $ _ {0.5-x} $ ba $ _ {x} $）comno $ _ {6} $的情况下调整与BA的自发交换偏置效应。
Tuning the spontaneous exchange bias effect with Ba to Sr partial substitution in La$_{1.5}$(Sr$_{0.5-x}$Ba$_{x}$)CoMnO$_{6}$
论文作者
论文摘要
自发交换偏置（SEB）效应是最近在某些重进入的旋转玻璃材料中观察到的一个了不起的现象。在这里，我们在LA $ _ {1.5} $（sr $ _ {0.5-x} $ ba $ _ {x} $）comno $ _ {6} $ double-perovskites中调查SEB，这是一个具有多种磁性阶段的系统，在交易所偏见偏见的偏见中值得注意的磁性阶段，这是一个值得注意的增长。 BA替换为SR替代导致晶格的增强，并伴随着有效的磁矩（$μ__{eff} $）和抗铁磁（AFM）过渡温度的提高，这些温度在铁磁有序下方观察到。这样的增加可能与高旋转配置中的co $^{3+} $的比例增加有关，从而增强了Co $^{3+} $ - O--Mn $^{4+} $ afm阶段，以及减少CO和MN之间AFM量的不兼容。增加$μ_{eff} $和AFM相的合并效应解释了SEB效应的变化。
The spontaneous exchange bias (SEB) effect is a remarkable phenomenon recently observed in some reentrant spin-glass materials. Here we investigate the SEB in La$_{1.5}$(Sr$_{0.5-x}$Ba$_{x}$)CoMnO$_{6}$ double-perovskites, a system with multifarious magnetic phases for which a notable increase in the exchange bias field is observed for intermediate Sr/Ba concentrations. The Ba to Sr substitution leads to the enhancement of the crystal lattice, which is accompanied by the raise of both the effective magnetic moment ($μ_{eff}$) and the antiferromagnetic (AFM) transition temperature that is observed below the ferromagnetic ordering. Such increases are likely related to the increased fraction of Co$^{3+}$ in the high spin configuration, leading to the enhancement of Co$^{3+}$--O--Mn$^{4+}$ AFM phase and to the reduction in the uncompensation of the AFM coupling between Co and Mn. The combined effect of the increased $μ_{eff}$ and AFM phase plausible explains the changes in the SEB effect.
