Open AccessUnusual weak increase of Curie temperature and lattice parameters in Pr2Fe16.5Zr0.5
Author(s) -
S.P. Platonov,
А. Г. Кучин,
В. С. Гавико,
В. И. Воронин,
M. Yu. Yakovleva
Publication year - 2019
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1389/1/012129
Subject(s) - curie temperature , neutron diffraction , lattice constant , magnetic moment , crystal structure , materials science , magnetic refrigeration , thermomagnetic convection , lattice (music) , crystallography , curie , atom (system on chip) , diffraction , condensed matter physics , ferromagnetism , chemistry , magnetization , magnetic field , physics , quantum mechanics , acoustics , optics , computer science , embedded system
Crystal structure and magnetic and thermomagnetic properties of the Pr 2 Fe 17- x M x compounds with M = Ti, V, Cr, Zr, Nb have been studied. The change of interatomic distances is not enough to explain the growth of the Curie point and it is necessary to assume the distribution of M = Ti, V, Cr, Nb atoms over the lattice positions, similar to that previously published for the Nd 2 Fe 17- x M x compounds. It was established by neutron diffraction that Zr atoms substitute for Pr atoms in the 6 c site and do not substitute for Fe atoms as might be expected from the original formula Pr 2 Fe 16.5 Zr 0.5 . So, the real composition of the substituted compound studied is Pr 14.8(8) Zr 0.52(8) Fe 17 . The magnetic moment of Fe atom and the magnetocaloric effect in the Pr 2 Fe 17- x M x compounds decrease with decreasing Fe content.