Giant effect of Sm atoms on time stability of (NdDy)(FeCo)B magnet Roman B. Morgunov, Ekaterina I. Kunitsyna, Victor V. Kucheryaev, Vadim P. Piskorskii, Olga G. Ospennikova and Eugene N. Kablov Eur. Phys. J. Plus, 131 9 (2016) 344 Published online: 30 September 2016 DOI: 10.1140/epjp/i2016-16344-7