TY - JOUR
T1 - Magnetoelectric effect and spontaneous polarization in HoFe3 (BO3) 4 and Ho0.5 Nd0.5 Fe3 (BO 3) 4
AU - Chaudhury, R. P.
AU - Yen, F.
AU - Lorenz, B.
AU - Sun, Y. Y.
AU - Bezmaternykh, L. N.
AU - Temerov, V. L.
AU - Chu, C. W.
PY - 2009/9/21
Y1 - 2009/9/21
N2 - The thermodynamic, magnetic, dielectric, and magnetoelectric properties of HoFe3 (BO3) 4 and Ho0.5 Nd0.5 Fe3 (BO3) 4 are investigated. Both compounds show a second order Neél transition above 30 K and a first-order spin reorientation transition below 10 K. HoFe3 (BO3) 4 develops a spontaneous electrical polarization below the Neél temperature (TN) which is diminished in external magnetic fields. No magnetic-field induced increase of the polarization could be observed in HoFe3 (BO3) 4. In contrast, the solid solution Ho0.5 Nd0.5 Fe3 (BO3) 4 exhibits both, a spontaneous polarization below TN and a positive magnetoelectric effect at higher fields that extends to high temperatures. The superposition of spontaneous polarization, induced by the internal magnetic field in the ordered state, and the magnetoelectric polarizations due to the external field results in a complex behavior of the total polarization measured as a function of temperature and field.
AB - The thermodynamic, magnetic, dielectric, and magnetoelectric properties of HoFe3 (BO3) 4 and Ho0.5 Nd0.5 Fe3 (BO3) 4 are investigated. Both compounds show a second order Neél transition above 30 K and a first-order spin reorientation transition below 10 K. HoFe3 (BO3) 4 develops a spontaneous electrical polarization below the Neél temperature (TN) which is diminished in external magnetic fields. No magnetic-field induced increase of the polarization could be observed in HoFe3 (BO3) 4. In contrast, the solid solution Ho0.5 Nd0.5 Fe3 (BO3) 4 exhibits both, a spontaneous polarization below TN and a positive magnetoelectric effect at higher fields that extends to high temperatures. The superposition of spontaneous polarization, induced by the internal magnetic field in the ordered state, and the magnetoelectric polarizations due to the external field results in a complex behavior of the total polarization measured as a function of temperature and field.
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U2 - 10.1103/PhysRevB.80.104424
DO - 10.1103/PhysRevB.80.104424
M3 - Article
AN - SCOPUS:70349900899
SN - 1098-0121
VL - 80
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 10
M1 - 104424
ER -