蜂窝碘化镍的巨磁晶各向异性及其超过17 T的巨 coercive field
Giant Magnetocrystalline Anisotropy in Honeycomb Iridate NiIrO3 with Large Coercive Field Exceeding 17 T
AI总结：
NiIrO3通过软拓扑反应合成，展现极高的磁晶各向异性与coercivity，为研究低维量子自旋系统和自旋电子学提供新平台。
摘要：
在摩擦和自旋轨道耦合材料中实现非常规量子相态仍处于量子材料研究的前沿。本文报告了通过软拓扑反应合成和发现NiIrO3，这是第一个具有耦合3d-5d磁子晶格的蜂窝碘化物。结构分析显示，NiO6和IrO6八面体蜂窝子晶格以Kitaev几何排列成Ilmenite型堆叠。全面的磁性和电输运测量揭示了其在213 K以下的长程铁磁序，这与已知的蜂窝碘化物中主要的反铁磁序形成鲜明对比。值得注意的是，该化合物表现出极高的磁晶各向异性能为32.2 meV/f.u.和在4.2 K以下超过17.3 T的巨 coercivity，两者均为至今观察到的最高值之一。结合实验和理论研究表明，这种优异的各向异性和coercivity源于耦合3d-5d蜂窝晶格网络中强晶格摩擦与Ir4+（Jeff=1/2）态的稳健自旋轨道耦合的协同效应。这项工作将NiIrO3定位为研究低维和摩擦量子自旋系统的重要平台，并通过定向工程3d-5d相互作用突显其在自旋电子学中的应用潜力。
英文摘要：
The realization of unconventional quantum phases in frustrated and spin-orbit coupled materials remains at the forefront of quantum materials research. Here we report the synthesis and discovery of NiIrO3, the first honeycomb iridate with coupled 3d-5d magnetic sublattices, through a soft topotactic reaction. Structural analysis reveals an ilmenite-type stacking of edge-sharing NiO6 and IrO6 octahedral honeycomb sublattices in a Kitaev geometry. Comprehensive magnetic and electrical transport measurements unveil its long-range ferrimagnetic order below 213 K, which is in sharp contrast to the predominantly antiferromagnetic order in the known honeycomb iridates. Notably, the titled compound displays an exceptionally large magnetocrystalline anisotropy energy of 32.2 meV/f.u. and a giant coercivity with coercive field exceeding 17.3 T below 4.2 K, both ranking among the highest observed in iridates to date. Combined experimental and theoretical investigations indicate that the exceptional anisotropy and coercivity originate from the synergistic effect between strong lattice frustration in the coupled 3d-5d honeycomb lattice network and the robust spin-orbit coupling of the Ir4+ (Jeff = 1/2) state. This work positions NiIrO3 as a promising platform to investigate low-dimensional and frustrated quantum spin systems, and highlights its potential for spintronic applications through the targeted engineering of 3d-5d interactions.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
