The spin–orbit–phonon coupling and crystalline elasticity of LaCoO<sub>3</sub> perovskite

In this article we report the structural, morphology, vibrational, optical and magnetic properties of Ba x La1−x CoO3 (x = 0, 0.05, and 0.1) (LBCO) samples. The X-ray diffraction shows that samples are in single rhombohedral phase. The Raman signals of LCO were quite small in comparison to LBCO, which exhibited a Raman peak above 675 cm−1. The band seen with a wavenumber of 484 cm−1 corresponds to the vibrational modes of E g bending and Ba–O stretching. UV–DRS and photoluminescence spectra indicated broad absorption over the ultraviolet, visible, and near-infrared spectrums. Surface morphology and EDAX spectra corroborated the materials homogeneous size distribution and homogenous microstructure, with Ba indicating a more stable structure. XPS was used to study chemical states of LBCO and found Co (2p), La (3d), O (1s), and C (1s) elements in perovskite compounds. A peak beneath 300 eV indicated adventitious carbon on surface materials. XPS survey spectrum elements La, Ba, Co, and O had their own binding energies. The magnetization-field dependency of LBCO at 300 K showed that Ba insertion into the LCO switched it from paramagnetic to weak ferromagnetic. Ba considerably decreased magnetic saturation and coercivity, influencing magneto-crystallites’ anisotropy and coercive field.

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The spin–orbit–phonon coupling and crystalline elasticity of LaCoO₃ perovskite

Abstract: Considering the before and after phonon softening, the gap in a CoO6-octahedral crystal electric fields (CEF) and the thermally activated spin gap, were observed of ∼0.5 meV and Q ∼ 25 meV in defect-free LaCoO3 single crystal, respectively.

Cited by 3 publications

References 55 publications

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The spin–orbit–phonon coupling and crystalline elasticity of LaCoO3 perovskite

Abstract: Considering the before and after phonon softening, the gap in a CoO6-octahedral crystal electric fields (CEF) and the thermally activated spin gap, were observed of ∼0.5 meV and Q ∼ 25 meV in defect-free LaCoO3 single crystal, respectively.

Cited by 3 publications

References 55 publications

Well-designed 2D vanadium carbide (V2C) MXenes supported LaCoO3/g-C3N4 heterojunction for highly efficient and stable photocatalytic CO2 reduction to CO and CH4

Well-designed 2D vanadium carbide (V2C) MXenes supported LaCoO3/g-C3N4 heterojunction for highly efficient and stable photocatalytic CO2 reduction to CO and CH4

Crystal structure and thermoelectric properties of mechanically activated LaCoO3

Influence of doping concentrations on the structural, optical, and magnetic properties of Ba-doped LaCoO3 nanostructure

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Product

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The spin–orbit–phonon coupling and crystalline elasticity of LaCoO₃ perovskite

Influence of doping concentrations on the structural, optical, and magnetic properties of Ba-doped LaCoO₃ nanostructure