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Effects of Chemical Insertion of Hydrogen on the Structural and Magnetic Properties of Sm 2 Fe 17—x Si x and Nd 2 Fe 17—x Co x with 0 < x ≤ 3
Author(s) -
Ben Kraiem M.S.,
Ellouze M.,
CheikhRouhou A.,
l'Héritier Ph.
Publication year - 2001
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/1521-3951(200112)228:3<751::aid-pssb751>3.0.co;2-g
Subject(s) - curie temperature , hydrogen , lattice constant , materials science , magnetization , crystallography , x ray crystallography , diffraction , trigonal crystal system , lattice (music) , saturation (graph theory) , hydrogen storage , chemistry , crystal structure , condensed matter physics , analytical chemistry (journal) , ferromagnetism , magnetic field , physics , mathematics , organic chemistry , chromatography , quantum mechanics , combinatorics , acoustics , optics
Hydrides of Sm 2 Fe 17— x Si x and Nd 2 Fe 17— x Co x ( x = 1—3) compounds are investigated by a chemical method. A single phase with rhombohedral Th 2 Zn 17 ‐type structure for both series of samples has been obtained from X‐ray diffraction. Lattice parameters a , c , and the unit cell volume of the hydrides are found to decrease linearly with Si contents. But only the parameter c increases with increasing Co concentration. The insertion of hydrogen in the structure increases the lattice parameters and the unit cell volume. The Curie temperatures increase with increasing Si and Co concentrations and also with hydrogen insertion. The saturation magnetisation decreases after insertion of hydrogen.