论文摘要
In this paper,we report on the crystal structure and magnetic properties of the nano structured Baordered phases of rare-earth manganites obtained from the optimally doped solid solutions Ln0.70Ba0.30MnO3（Ln=Pr,Nd）.The materials were studied by X-ray diffraction,scanning electron microscopy,energy dispersive spectroscopy and SQUID-magnetometry techniques.It is found that states with different degrees of cation ordering in the A-sublattice of the ABO3 perovskite can be obtained by employing special conditions of chemical treatment.In particular,reduction of the parent compounds results in the formation of a nanocomposite containing ferrimagnetic anion-deficient ordered phase LnBaMn2O5.Oxidation of the composite does not change an average size of the nanocrystallites,but drastically alters their phase composition to stabilize ferromagnetic stoichiometric ordered phase LnBaMn2O6 and ferromagnetic superstoichiometric disordered phase Ln0.90Ba0.10MnO3+δ.It is shown that the magnetic properties of the materials are determined by the joint action of chemical（cation ordering）and external（surface tension） pressures.
论文目录
文章来源
类型: 期刊论文
作者: S.V.Trukhanov,V.A.Khomchenko,D.V.Karpinsky,M.V.Silibin,A.V.Trukhanov,L.S.Lobanovsky,H.Szymczak,C.E.Botez
来源: Journal of Rare Earths 2019年11期
年度: 2019
分类: 工程科技Ⅰ辑
专业: 化学
单位: National University of Science and Technology MISiS,South Ural State University,Scientific-Practical Materials Research Centre of NASB,CFisUC,Department of Physics,University of Coimbra,Institute for Bionic Technologies and Engineering,I.M.Sechenov First Moscow State Medical University,Institute of Physics,Polish Academy of Sciences,The University of Texas at El Paso
基金: Project supported by the European Union’s Horizon 2020Research and Innovation Programme under the Marie Sklodowska-Curie grant agreement(778070)
分类号: O614.331
页码: 1242-1249
总页数: 8
文件大小: 1459K
下载量: 3