Clulow Rebecca, Pramanik Prativa, Stolpe Amanda, Joshi Deep C, Mathieu Roland, Henry Paul F, Sahlberg Martin
Department of Chemistry - Ångström Laboratory, Uppsala University, Box 538, 751 21 Uppsala, Sweden.
Department of Materials Science and Engineering, Uppsala University, Box 35, 751 03 Uppsala, Sweden.
Inorg Chem. 2024 Apr 15;63(15):6616-6625. doi: 10.1021/acs.inorgchem.3c04277. Epub 2024 Apr 3.
Four new compositionally complex perovskites with multiple (four or more) cations on the B site of the perovskites have been studied. The materials have the general formula LaSr(M)O (M = Ti, Mn, Fe, Co, and Ni) and have been synthesized via conventional solid-state synthesis. The compounds are the first reported examples of compositionally complex = 2 Ruddlesden-Popper perovskites. The structure and properties of the materials have been determined using powder X-ray diffraction, neutron diffraction, energy dispersive X-ray spectroscopy, X-ray photoelectron spectroscopy, and magnetometry. The materials are isostructural and adopt the archetypal 4/ space group with the following unit cell parameters: ∼ 3.84 Å, and ∼ 20.1 Å. The measured compositions from energy dispersive X-ray spectroscopy were LaSrTiMnFeCoNiO, LaSrMnFeCoNiO, LaSrMnFeCoNiO, and LaSrMnFeCoNiO. No magnetic contribution is observed in the neutron diffraction data, and magnetometry indicates a spin glass transition at low temperatures.
已对四种新型的、在钙钛矿B位上具有多个（四个或更多）阳离子的成分复杂的钙钛矿进行了研究。这些材料的通式为LaSr(M)O（M = Ti、Mn、Fe、Co和Ni），并通过传统的固态合成法合成。这些化合物是首次报道的成分复杂的 = 2 鲁德尔斯登-波珀钙钛矿的实例。已使用粉末X射线衍射、中子衍射、能量色散X射线光谱、X射线光电子能谱和磁测量法确定了这些材料的结构和性能。这些材料是同构的，采用典型的4/ 空间群，具有以下晶胞参数： ∼ 3.84 Å， ∼ 20.1 Å。能量色散X射线光谱测得的成分分别为LaSrTiMnFeCoNiO、LaSrMnFeCoNiO、LaSrMnFeCoNiO和LaSrMnFeCoNiO。在中子衍射数据中未观察到磁贡献，磁测量表明在低温下存在自旋玻璃转变。
