Vibrational spectra and elastic, piezoelectric, and magnetoelectric properties of HoFe3(BO3)4 and HoAl3(BO3)4 crystals

Magnetoelectric and magnetic properties of aluminum borates Ho1 − x Nd x Al3(BO3)4

“…Recently, it was shown that the difference in the ΔP values in HoFe 3 (BO 3 ) 4 and HoAl 3 (BO 3 ) 4 is mainly due to the difference in the magnetostriction values [12]. The authors of [12] believe that the magnetoelectric effect arising in RM 3 (BO 3 ) 4 is determined by the mag netostriction and piezoelectricity. Lattice deformation that determines the appearance of the polarization occurs in the magnetic field.…”

“…For example, the correlation between the field depen dences of the polarization and magnetostriction was found in TmAl 3 (BO 3 ) 4 [8], HoAl 3 (BO 3 ) 4 [9], iron borates [7,24], and Ho 0.75 Nd 0.25 Fe 3 (BO 3 ) 4 [26]. Recently, it was shown that the difference in the ΔP values in HoFe 3 (BO 3 ) 4 and HoAl 3 (BO 3 ) 4 is mainly due to the difference in the magnetostriction values [12]. The authors of [12] believe that the magnetoelectric effect arising in RM 3 (BO 3 ) 4 is determined by the mag netostriction and piezoelectricity.…”

“…It was shown in [12] that the difference in the polarization values in HoFe 3 (BO 3 ) 4 and HoAl 3 (BO 3 ) 4 is mainly due to the difference in the magnetostriction values. The anomalous temperature dependence of the polarization was found in TbAl 3 (BO 3 ) 4 .…”

Raman study of HoFe3(BO3)4 at simultaneously high pressure and high temperature: p–T phase diagram

“…The ferroborates with various rear‐earth elements traditionally were studied by Raman spectroscopy . The temperature phase transition in HoFe 3 (BO 3 ) 4 earlier was investigated by high‐resolution spectroscopy, IR spectroscopy, Raman spectroscopy, and ab‐initio calculations . However, a structural phase transition in holmium ferroborate has never been studied under high hydrostatic pressure.…”

Direct and inverse magnetoelectric effects in HoAl3(BO3)4 single crystal

“…It has been recently demonstrated that the value of magnetoelectric polarization in HoFe 3 (BO 3 ) 4 and HoAl 3 (BO 3 ) 4 is mainly caused by the value of magnetostriction in these compounds. 27 However, the processes occurring at the microscopic level are still not fully understood. The magnetoelectric interaction, and in particular, the role of a rare-earth ion, needs further investigation.…”