Theory of two-magnon Raman scattering in alkaline iron selenide superconductors

Liu, C.S.; Zhang, A.M.; Xu, T.F.; Wu, Weixing

doi:10.1016/j.physc.2014.08.008

Cited by 2 publications

(1 citation statement)

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“…The Raman spectrum of bulk BaO displays two bands, located at 180 and 275 cm −1 . The band centered at 300 cm −1 is associated with CuO oxide; thus, we conclude that the synthesis method permits the coexistence of metal oxides of La, Ba, and Cu in several planes along unit cells of perovskite, thus allowing its identification as reported previously [28,29]. The presence of carbonaceous species was discarded since the characteristic band, located at 1310 cm −1 , was not found, confirming the effectiveness of the proposed synthesis method as shown in Fig.…”

Section: Resultssupporting

confidence: 75%

Synthesis and Characterization of LaBa2Cu3O7−δ System by Combustion Technique

Rivera

Cuaspud

Vargas

et al. 2016

J Supercond Nov Magn

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This paper reports the synthesis and characterization of a lanthanum-barium-copper oxide, based on a LaBa 2 Cu 3 O 7 system, using a wet chemical route that enables the combustion-polymerization of citrate species, in order to generate materials with enhanced surface and textural and morphological properties for potential applications. The synthesized precursor in a form of a coordination complex was characterized by Fourier transform infrared spectroscopy (FTIR) analysis in order to evaluate the formation of homogeneous and soluble citrate species as intermediates of reaction. The morphological and structural characterizations were performed over calcined material with X-ray diffraction (XRD) and electron microscopy (scanning electron microscopy (SEM)-transmission electron microscopy (TEM)) analyses, confirming the obtention of an orthorhombic crystalline phase type Pmmm (47) in the nanometric range ≈8.9 nm. Analyses of the ceramic oxide by Raman spectroscopy and X-ray photoelectron Pátria, 156, Niterói, 24210-240, Brazil spectroscopy (XPS) allowed to perform qualitative and quantitative assessments of the material composition, showing that the final oxide is closely related to the desired composition, discarding the presence of carbonaceous residues of the synthesis process.

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Section: Resultssupporting

confidence: 75%