论文标题
SM $ _ {2} $ nimno $ _ {6} $ double double double perovskite的结构，电子和磁状态的存在
Existence of inter coupled structural, electronic and magnetic states in Sm$ _{2} $NiMnO$ _{6} $ double perovskite
论文作者
论文摘要
不同相互作用之间的耦合可以通过扰动任何自由度来控制多功能材料中的物理方面。在这里，我们的目标是探测SM $ _ {2} $ nimno $ _ {6} $ Ferromagnetic绝缘子双perovskite的结构，电子和磁性可观察物之间的相关性。我们采用的方法包括同步加速器X射线衍射的热演化，靠近边缘和延伸的硬X射线吸收光谱和块状磁力测定法。 SNMO中的磁性顺序通过T $ _ {C} $ = 159.6K采用了两个过渡，这是由于Ni-Mn Sublattice的铁磁布置以及T $ _ {d} $ = 34.1K，由于对Ni-Mn网络的极性SM paramagnetic Moments的抗平行比对。 SNMO的全局和局部晶体结构经历了T $ _ {C} $和T $ _ {D} $的同一结构过渡，通过NI/MN-O，Ni-MN键合中的温度依赖性变化观察到Ni-Mn键合字符和NI-O-MN链接中的超级交换角度。 Ni，Mn 3 \ textit {d}，o 2 \ textit {p}电子状态之间的杂交也在磁性转变附近进行了修改。另一方面，局部结构和磁化分析可以证明Ni/MN抗位点疾病的特征。晶体环境的变化通过施加金属 - 配体轨道重叠的改变来控制磁反应。利用这些免费探针，我们发现结构，电子和磁性状态与SNMO偶联，这使其成为技术使用的潜在平台。
Coupling between different interactions allows to control physical aspects in multifunctional materials by perturbing any of the degrees of freedom. Here, we aim to probe the correlation among structural, electronic and magnetic observables of Sm$ _{2} $NiMnO$ _{6} $ ferromagnetic insulator double perovskite. Our employed methodology includes thermal evolution of synchrotron X-ray diffraction, near edge and extended edge hard X-ray absorption spectroscopy and bulk magnetometry. The magnetic ordering in SNMO adopts two transitions, at T$ _{C} $=159.6K due to ferromagnetic arrangement of Ni-Mn sublattice and at T$ _{d} $=34.1K because of anti-parallel alignment of polarized Sm paramagnetic moments with respect to Ni-Mn network. The global as well as local crystal structure of SNMO undergoes isostructural transitions across T$ _{C} $ and T$ _{d} $, observed by means of temperature dependent variation in Ni/Mn-O, Ni-Mn bonding characters and super exchange angle in Ni-O-Mn linkage. Hybridization between Ni, Mn 3\textit{d}, O 2\textit{p} electronic states is also modified in the vicinity of magnetic transition. On the other hand, the signature of Ni/Mn anti-site disorders are evidenced from local structure and magnetization analysis. The change in crystal environments governs the magnetic response by imposing alteration in metal - ligand orbital overlap. Utilizing these complimentary probes we have found that structural, electronic and magnetic states are inter-coupled in SNMO which makes it a potential platform for technological usage.
