Low-temperature magnetic phase transitions in the Nd0.9Dy0.1Fe3 (BO3)4 multiferroic. Part 1. Transitions induced by the magnetic field directed along the axis of the trigonal symmetry. Spontaneous transitions taking place with the changes of temperature - G. A. Zvjagina; K. R. Zhekov; I. V. Bilych; M. P. Kolodjazhnaja; A. A. Zvjagin; A. N. Bludov; V. A. Pashchenko; I. A. Gudim (Low Temperature Physics, 2016)