Аннотация: The magnetic, magnetoelectric, and magnetoelastic properties of RFe3(BO3)4 ferroborates are studied. The measurement of the field dependences of the magnetoelectric polarization along the a axis in holmium ferroborate and in the mixed composition Ho0.5Sm0.5Fe3(BO3)4 revealed the following dependences for easy-plane ferroborates: (a) the longitudinal and transverse magnetoelectric effects have the opposite signs and (b) magnetically induced polarization changes its sign in a field close to the field of exchange between rare-earth and iron ions. These dependences agree well with theoretical predictions based on the symmetry of the compounds. The relatively low f-d exchange field in holmium ferroborate (about 20 kOe), which magnetizes the rare-earth subsystem, causes smaller polarization jumps (about 30 μC/m2) in fields lower than 10 kOe as compared to the jumps in other easy-plane ferroborates (R = Sm, Nd). The increase in the electric polarization induced in HoFe3(BO3)4 in magnetic fields higher than 100 kOe (200–300 μC/m2) is found to be significantly smaller than in neodymium ferroborate, which indicates a substantial dependence of the magnetoelectric effects on the electronic structure of a rare-earth ion.
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Держатели документа:
[Kadomtseva, A. M.
Vorob'ev, G. P.
Popov, Yu F.
Pyatakov, A. P.] Moscow MV Lomonosov State Univ, Moscow 119992, Russia
[Pyatakov, A. P.
Mukhin, A. A.
Ivanov, V. Yu
Zvezdin, A. K.] Russian Acad Sci, Inst Gen Phys, Moscow 119991, Russia
[Gudim, I. A.
Temerov, V. L.
Bezmaternykh, L. N.] Russian Acad Sci, Siberian Branch, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
Доп.точки доступа:
Kadomtseva, A. M.; Vorob'ev, G. P.; Popov, Y. F.; Pyatakov, A. P.; Mukhin, A. A.; Ivanov, V. Y.; Zvezdin, A. K.; Gudim, Irina A.; Гудим, Ирина Анатольевна; Temerov, V. L.; Темеров, Владислав Леонидович; Bezmaternykh, L. N.; Безматерных, Леонард Николаевич