Pramanik P, Clulow R, Joshi D C, Stolpe A, Berastegui P, Sahlberg M, Mathieu R
Department of Materials Science and Engineering, Uppsala University, Box 35, 751 03, Uppsala, Sweden.
Department of Chemistry - Ångström Laboratory, Uppsala University, Box 538, 751 21, Uppsala, Sweden.
Sci Rep. 2024 Feb 9;14(1):3382. doi: 10.1038/s41598-024-53896-2.
Temperature-dependent dc-magnetization and ac-susceptibility curves have been recorded for series of single and double layered Ruddlesden-Popper multicomponent perovskites with chemical formula ABO and ABO, respectively, with (La, Sr) on A-sites and up to 7 different cations on the B-sites (Ti, Cr, Mn, Fe, Co, Ni, Cu). The phase purity and chemical homogeneity of the compounds were investigated by X-ray diffraction and energy dispersive X-ray spectroscopy. Independently of the composition, spin glassiness is observed in both systems. Scaling analyses suggest the materials undergo spin glass phase transitions at low temperatures. Yet, qualitative differences are observed between the single-layered and double-layered systems, which are discussed in the light of the spatial dimensionality and magnetic interaction in layered oxide perovskites.
已记录了一系列化学式分别为ABO和ABO的单层和双层Ruddlesden-Popper多组分钙钛矿的温度依赖直流磁化曲线和交流磁化率曲线，其中A位为（La，Sr），B位有多达7种不同阳离子（Ti、Cr、Mn、Fe、Co、Ni、Cu）。通过X射线衍射和能量色散X射线光谱研究了化合物的相纯度和化学均匀性。与组成无关，在两个体系中均观察到自旋玻璃态。标度分析表明材料在低温下经历自旋玻璃相转变。然而，在单层和双层体系之间观察到了定性差异，并根据层状氧化物钙钛矿中的空间维度和磁相互作用进行了讨论。
