Probing multiferroicity and spin-spin interactions via angular dependent dielectric measurements on Y-doped HoMnO3 in high magnetic fields

Dielectric measurements are used to characterize magnetic phase transitions in the doped ferroelectric oxides Ho1−xYxMnO3 (x=0.4). The focus of this experiment is on the effects of the magnetic field direction on the reentrant T-B-θ phase diagram below the Néel temperature. The Ho sublattice plays a major role in all magnetic phase transitions for Y doping (x=0.4), consistent with previous results (x=0,0.6,0.8). Two successive Mn spin rotations …