Low-temperature magnetic phase transitions in the multiferroic Nd0.9Dy0.1Fe3(BO3)4. Part 1. Transitions induced by magnetic fields directed along the trigonal symmetry axis. Spontaneous transitions with temperature changes

The elastic and magnetic characteristics of single-crystal Nd0.9Dy0.1Fe3(BO3)4 are studied at low temperatures in zero magnetic field and in external fields H||C3. The temperature dependences of the acoustic mode velocities and the magnetic susceptibility manifest a transition of the magnetic subsystem into a magnetically ordered state and two successive, spontaneous spin-reorientation phase transitions. The possibility of a spontaneous transition into an incommensurate (spiral) magnetic phase in the crystal is discussed. It is shown that an external magnetic field directed along the trigonal axis of the crystal induces a sequence of spin-reorientation phase transitions. An H-T phase diagram (H||C3) is constructed for this compound.

[1]  G. A. Zvyagina.  Magnetoelastic properties of Nd0.9Dy0.1Fe3(BO3)4 ferroborate , 2014 .

[2]  I. Gudim,et al.  Magnetic field-induced phase transitions in the antiferromagnet Nd0.6Dy0.4Fe3(BO3)4 , 2014 .

[3]  V. Temerov,et al.  Magnetoelastic studies of Nd0.75Dy0.25Fe3(BO3)4 in the external magnetic field: Magnetic phase transitions , 2013 .

[4]  I. Gudim,et al.  Magnetic anisotropy in the basal plane of the rare-earth ferroborate Nd0.75Dy0.25Fe3(BO3)4 , 2012 .

[5]  I. Gudim,et al.  Magnetic properties of Nd0.9Dy0.1Fe3(BO3)4 , 2012 .

[6]  V. Temerov,et al.  Flux growth and spin reorientation in trigonal Nd1−xDyxFe3(BO3)4 single crystals , 2010 .

[7]  L. Bezmaternykh,et al.  Magnetoelectric and magnetoelastic properties of rare-earth ferroborates , 2010 .

[8]  L. Bezmaternykh,et al.  Magnetic phase diagram and magnetoelectric properties of Ho0.25Nd0.75Fe3(BO3)4 , 2010 .

[9]  I. Gudim,et al.  Low-temperature phase transitions in the rare-earth ferroborate Nd0.75Dy0.25Fe3(BO3)4 , 2010 .

[10]  V. Petricek,et al.  Single magnetic chirality in the magnetoelectric NdFe₃(¹¹BO₃)₄ , 2010, 1001.1784.

[11]  L. Bezmaternykh,et al.  Magnetoelectric effect and spontaneous polarization in HoFe 3 (BO 3 ) 4 and Ho 0.5 Nd 0.5 Fe 3 (BO 3 ) 4 , 2009, 0906.1227.

[12]  Y. Tokura,et al.  Rotation of an electric polarization vector by rotating magnetic field in cycloidal magnet Eu0.55Y0.45MnO3. , 2008, Physical review letters.

[13]  I. Gudim,et al.  Thermodynamic properties of NdFe3(BO3)4 , 2007 .

[14]  A. Vasiliev,et al.  Rare-earth ferroborates RFe3(BO3)4 , 2006 .

[15]  D. Sheptyakov,et al.  Simultaneous antiferromagnetic Fe3+ and Nd3+ ordering in NdFe3(11BO3)4 , 2006, cond-mat/0608304.

[16]  Sung-Ik Lee,et al.  Elastic constants of borocarbides. New approach to acoustic measurement technique , 2003, cond-mat/0301183.