Magnetic field-induced phase transitions in the antiferromagnet Nd0.6Dy0.4Fe3(BO3)4
G.A. Zvyagina1, K.R. Zhekov1, I.V. Bilych1, А.А. Zvyagin1,2, A.N. Bludov1, V.A. Pashchenko1, and I.А. Gudim3
1B. Verkin Institute for Low Temperature Physics and Engineering of the National Academy of Sciences of Ukraine 47 Lenin Ave., Kharkov 61103, Ukraine
2Max-Planck-Institute for Physics of Complex Systems, 38 Noethnitzer Strasse, Dresden D-01187, Germany
3L.V. Kirenskiy Institute of Physics, Siberian Branch of the Russian Academy of Sciences Krasnoyarsk 660036, Russia
Received July 13, 2013
Low-temperature studies of elastic and magnetic characteristics of the single crystal Nd0.6Dy0.4Fe3(BO3)4 have been performed. A transition to the antiferromagnetically ordered state of the magnetic subsystem has been manifested in the temperature behavior of the velocity and attenuation of acoustic modes and magnetization. Spin-reorientation phase transitions, which reveal themselves as anomalies in the behavior of elastic and magnetic characteristics of the crystal in the external magnetic field applied along the axis of the trigonal symmetry of the crystal have been discovered. The phase H–T diagram for H || С3 has been constructed.
PACS: 72.55.+s Magnetoelastic effects; PACS: 74.25.Ld Mechanical and acoustical properties, elasticity and ultrasonic attenuation.
Key words: rare earth ferroborates, magnetoelastic coupling, magnetic phase transitions.