Abstract
Crystal structure and magnetic and thermomagnetic properties of the Pr2Fe17-xMx 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 Nd2Fe17-xMx compounds. It was established by neutron diffraction that Zr atoms substitute for Pr atoms in the 6c site and do not substitute for Fe atoms as might be expected from the original formula Pr2Fe16.5Zr0.5. So, the real composition of the substituted compound studied is Pr14.8(8)Zr0.52(8)Fe17. The magnetic moment of Fe atom and the magnetocaloric effect in the Pr2Fe17-xMx compounds decrease with decreasing Fe content.
Highlights
Euro-Asian Symposium “Trends in Magnetism”Unusual weak increase of Сurie temperature and lattice parameters in Pr2Fe16.5Zr0.5
Magnetic refrigeration based on the magnetocaloric effect (MCE) is currently a topic of growing interest due to high efficiency, reliability, and environmental safety
It was established by neutron diffraction that Zr atoms substitute for Pr atoms in the 6с site and do not substitute for Fe atoms as might be expected from the original formula Pr2Fe16.5Zr0.5
Summary
Unusual weak increase of Сurie temperature and lattice parameters in Pr2Fe16.5Zr0.5. 1M.N. Miheev Institute of Metal Physics of UB of RAS, Ekaterinburg, Russia 2Ural Federal University named after B.N. Yeltsin, Ekaterinburg, Russia
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