论文标题
LA $ _ {1.5} $ CA $ _ {0.5} $的结构，电子和磁性
Structural, electronic and magnetic properties of La$_{1.5}$Ca$_{0.5}$(Co$_{0.5}$Fe$_{0.5}$)IrO$_6$ double perovskite
论文作者
论文摘要
在这项工作中，我们报告了LA $ _ {1.5} $ ca $ _ {0.5} $的结构，电子和磁性特性的综合和调查（CO $ _ {0.5} $ _ {0.5} $ fe $ _ {0.5} $）IRO $ _6 $。我们的polyCryStalline样品形式为单相双钙钛矿，单斜$ p2_ {1}/n $ space组。 CO和IR最有可能分别在二价和四氧化状态下，而Mossbauer光谱法表明FE处于三价状态。 AC和DC磁化数据表明，由CO/FE和IR位点存在两个抗磁性sublattices产生的铁磁行为。在10 K处观察到的大型强制场h_c $ \ simeq $ 32 KOE，与硬磁体的其他双钙壶相当，可以根据结构失真以及过渡金属离子的旋转和轨道磁矩进行讨论。
In this work, we report the synthesis and investigation of structural, electronic, and magnetic properties of La$_{1.5}$Ca$_{0.5}$(Co$_{0.5}$Fe$_{0.5}$)IrO$_6$. Our polycrystalline sample forms as a single-phase double perovskite in monoclinic $P2_{1}/n$ space group. Co and Ir are most likely in bivalent and tetravalent oxidation states, respectively, while Mossbauer spectroscopy indicates that Fe is in a trivalent state. The ac and dc magnetization data suggest a ferrimagnetic behavior resulting from the presence of two antiferromagnetic sublattices at Co/Fe and Ir sites. The large coercive field H_C $\simeq$ 32 kOe observed at 10 K, comparable to that of other double perovskites of interest for hard magnets, is discussed in terms of the structural distortion and the spin and orbital magnetic moments of the transition metal ions.
