Abstract
We have systematically investigated the magnetic and the dielectric properties of Eu0.595(Y1−xHox)0.405MnO3 (0 ≤ x ≤ 1) single crystals with fine tunning of 4f magnetic moments while keeping the average size of the rare-earth (R) site the same. In the x = 0.3 crystal, the ferroelectric polarization along the c axis (Pc) emerges at 25 K; then, Pc is suppressed, and Pa appears simultaneously with decreasing temperature. On further decreasing temperature, Pa disappears and Pc appears again. The observed reentrant behavior of the Pc phase indicates that the Pa and the Pc phases are strongly competing with each other.
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