Magnetic and dielectric properties of single-crystalline ErFeMnO4

We report on the growth of single-crystal ErFeMnO4 and its magnetization, resistivity, and dielectric dispersion behaviors for varying temperature and electric field. A clear bifurcation between the in-plane and out-of-plane M (T) curves is observed due to a paramagnetic-ferrimagnetic transition with a transition temperature of similar to 301 K, which is higher than for other RFe2O4 or substituted compounds. Over a similar temperature range, sudden changes in both the relative permittivity and resistivity were also observed, indicating a strong connection between the magnetization, resistivity and dielectric properties. It can be concluded that the electron transfer between the Fe-site ions plays an important role in these behaviors. Finally, a large relative tunability of 75.9% for relative permittivity epsilon(r) and a net polarization P of about similar to 408.7 mu C/m(2) were attained for a DC biased electric field E = 25 kV/m at 390 K, which are promising for the application of tunable ferroelectric devices.