E. N. Kablov, O. G. Ospennikova, V. P. Piskorsky, D. V. Korolev, E. I. Kunitsyna, A. D. Talantsev, R. B. Morgunov, “Competition of single-ion anisotropy of Sm and Dy ions during the spin-reorientation transition in Nd$_{1-x-y}$Sm$_{x}$Dy$_{y}$)(FeCo)B supermagnets”, Fizika Tverdogo Tela, 2016, Volume 58, Issue 7,Pages 1278

Magnetism

Competition of single-ion anisotropy of Sm and Dy ions during the spin-reorientation transition in Nd$_{1-x-y}$Sm$_{x}$Dy$_{y}$)(FeCo)B supermagnets

E. N. Kablov^a, O. G. Ospennikova^a, V. P. Piskorsky^a, D. V. Korolev^a, E. I. Kunitsyna^b, A. D. Talantsev^b, R. B. Morgunov^ab

^a All-Russian Scientific Research Institute of Aviation Materials, Moscow
^b Institute of Problems of Chemical Physics, Russian Academy of Sciences, Chernogolovka, Moscow region

Abstract: It has been found that an increase in the Sm concentration in the range $x$ = 0.05–0.18 in Nd$_{1-x-y}$Sm$_{x}$Dy$_{y}$)(FeCo)B supermagnets leads to a shift in the spin-reorientation transition temperature to higher values, whereas a Dy addition results in a decrease in the transition temperature. Single-ion anisotropy of Sm and Dy ions has different symmetry, making contributions of opposite signs to the resulting magnetic anisotropy of the lattice. Therefore, the threshold temperature $T_S$ of the spin-reorientation transition, which is determined by the balance of magnetic anisotropies of sublattices, can be controlled using ions with different symmetries.

Received: 13.10.2015