2019年9月12日 · Fig. 2 (a) shows the XPS spectra of Cr 2p level for the LaCrO 3 ceramics samples sintered under ambient pressure and high pressure. It can be seen that the peaks of the ambient-pressure sample exhibit near symmetrical with the peak value of 577 eV and 587 eV for Cr 2p 3/2 and Cr 2p 1/2 peak respectively, which are in agreement with the values ...

2023年1月1日 · LaCrO 3 perovskite oxide was synthesized through the solution combustion method. The sample was characterized using spectral techniques such as XRD, FTIR, DRS UV–Visible, SEM and XPS. The XRD pattern reveals LaCrO 3 structure with orthorhombic primitive lattices in the space group Pbnm (62) with an average crystallite size of 31 nm.

Sintered and polished samples of La 1−x Ca x CrO 3 (x = 0.0, 0.1, 0,3, 0.5) and La 1−x Ca x Cr 1−y Ni y O 3 (x = 0.3, y = 0.05) were annealed and quenched under reducing or oxidizing …

2022年4月17日 · The structural properties of as-prepared nanoparticles are studied in detail by using X-ray diffraction (XRD), Raman, and Fourier Transformation Infrared spectroscopy (FTIR). Using X-ray photoelectron spectroscopy (XPS), we examine how Sr 2+ substitution affects the valance states of Cr and oxygen vacancies in LaCrO 3.

Here we report a semiempirical activity descriptor of eg occupancy (of surface B-site cations) for identifying inexpensive perovskite oxides with extremely high efficacy toward NERA. We establish...

Stan-dard GGA calculations can explain the structural distortions of the Cr-O polyhedron, the magnetic ground state, XPS and O-K x-ray absorption spectra XAS , the light green color of pure LaCrO3, and the strong optical gap at 3.4 eV found in experiment.

X-ray diffraction results indicate that the Mn-doped LaCrO3 ceramics formed a solid solution with an orthorhombic perovskite structure when x≤0.6, with a tiny amount of Mn2O3 remaining when x=0.7.

We investigate Sr²⁺-doping influence on the structural, chemical, and magnetic properties of LaCrO3 prepared by the modified combustion method.

2018年1月24日 · 对于稀土铬氧化物RCrO 3 （ R＝Y 和稀土元素）来说，如果 A 位稀土离子本身不具有磁性，如La 、 Y 、 Lu ，则体系的磁性完全由 B 位 Cr3＋的磁性决定；如果 A 位离子具有磁性（除上述三种稀土元素外其他稀土元素均有不同大小的磁性）体系的磁性则由 R3＋ 、Cr3＋ 两个磁格子的磁性及其相互作用共同决定。 铬氧化物中的磁性主要来源于Cr3＋ 的磁矩来自 3d 电子，相邻的 Cr 3＋ 磁矩之间通过中间的 O2－ 产生反铁磁性的超交换耦合作用，该耦合作用 …

2018年4月1日 · It is found that when the oxygen partial pressure used during the deposition of LCO is low, the LCO/STO (111) becomes metallic after 11 unit cells (uc) of the LCO have grown. The band alignment is investigated by x-ray photoelectron spectroscopy (XPS) and the doping mechanism is discussed properly.