Staško Daniel, Hájek Filip, Vlášková Kristina, Kaštil Jiří, Henriques Margarida, Klicpera Milan
Department of Condensed Matter Physics, Faculty of Mathematics and Physics, Charles University, Ke Karlovu 5, 12116, Prague 2, Czech Republic.
Institute of Physics of the Czech Academy of Sciences, Na Slovance 1999/2, 182 21, Prague 8, Czech Republic.
Sci Rep. 2024 Sep 18;14(1):21773. doi: 10.1038/s41598-024-71049-3.
In addition to complex spin-ice and spin-liquid states of rare-earth pyrochlore oxides, AIrO iridates have been recently proposed to host a cooling-field-controllable antiferromagnetic domain structure of iridium moments. Reliable and profound studies of the magnetic domain structure, including domains' interfaces, have been frequently limited by insufficient sample quality or lack of single crystals. We report the magnetic properties of the for-the-first-time synthesised LuIrO and ErIrO single crystals; focussing on the robust ferromagnetic component of magnetisation present in the material with the antiferromagnetically ordered state of the all-in-all-out (AIAO) type. Anisotropy of the system, as well as the effects of magnetic (Er) or nonmagnetic (Lu) local environments on Ir moments, is studied. The size of the domains is calculated based on a simplified domain wall model. Results are discussed in the framework of AIAO and AOAI domains and interfaces on the geometrically frustrated lattice.
除了稀土烧绿石氧化物的复杂自旋冰和自旋液体状态外，最近有人提出，铱酸铝（AIrO）中铱矩具有可由冷却场控制的反铁磁畴结构。对磁畴结构（包括畴界面）进行可靠而深入的研究常常受到样品质量不足或缺乏单晶的限制。我们报道了首次合成的铱酸镥（LuIrO）和铱酸铒（ErIrO）单晶的磁性；重点关注该材料中存在的具有全进全出（AIAO）型反铁磁有序态的稳健铁磁磁化分量。研究了该体系的各向异性，以及磁性（铒）或非磁性（镥）局域环境对铱矩的影响。基于简化的畴壁模型计算了畴的尺寸。在几何受挫晶格上的AIAO和AOAI畴及界面的框架内对结果进行了讨论。
