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Structural, magnetic, and optical properties of nano‐sized Ni 0.85 Se
Author(s) -
Heiba Zein K.,
Mohamed Mohamed Bakr,
Mostafa Nasser Y.
Publication year - 2019
Publication title -
international journal of applied ceramic technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.4
H-Index - 57
eISSN - 1744-7402
pISSN - 1546-542X
DOI - 10.1111/ijac.13181
Subject(s) - materials science , crystallite , nanocrystalline material , octahedron , crystallography , ferromagnetism , diffraction , rietveld refinement , spectroscopy , hydrothermal circulation , transition metal , hexagonal crystal system , condensed matter physics , analytical chemistry (journal) , crystal structure , optics , nanotechnology , metallurgy , physics , biochemistry , chemistry , quantum mechanics , chromatography , seismology , geology , catalysis
Nanocrystalline Ni 0.85 Se was synthesized by a hydrothermal method. X‐ray diffraction analysis by Rietveld method indicated that Ni 0.85 Se has a NiAs‐type hexagonal structure. Narrow crystallite size distribution with an average area‐weighted size of 〈 ɛ F 〉 = 8.5 nm is obtained by Warren‐Averbach method. Structural analysis revealed deformed Se atoms octahedron with the shortest distance between Se atoms in adjacent planes 〈Se–Se〉 adj smaller than between nearest neighbors in layer plane 〈Se–Se〉 nea , and a rather short interatomic distance between the transition metal atoms 〈Ni–Ni〉. The optical property of Ni 0.85 Se was studied by UV‐spectroscopy. Magnetic measurement shows a ferromagnetic phase transition for Ni 0.85 Se below 14 K.