Features of Magnetic, Magnetoelectric and Magnetoelastic Properties of HoAl3(BO3)4

Abstract

The main features of the magnetic, magnetoelastic and record magnetoelectric properties of a HoAl3(BO3)4 alumoborate single crystal have been studied experimentally and theoretically. ForB||awe have observed a giant polarization ΔPba(Ba) ≈ –5240 µС/m2 induced by field of 9 T at T = 5 K. We have calculated the magnetic characteristics of HoAl3(BO3)4 in the framework of a crystal-field model. The parameters of the crystal-field in HoAl3(BO3)4 have been determined. Good agreement of experimental and calculational magnetization curves Mc,^с(В) and the temperature dependences of magnetization Mс,^с(T) was achieved. For interpretation of magnetostriction in HoAl3(BO3)4 the field and temperature dependences of the multipole moments have been calculated.