Linear Magnetoelectric Effects in Gallium Iron Oxide at Low Temperatures and in High Magnetic Fields

The magnetoelectric (ME) experiments1 on monocrystals of the piezoelectric ferromagnet Ga2−xFexO3 (x≈1) are extended to low temperatures (T≳4.2°K) and high magnetic fields (H≲150 kOe). It is found that: (1) The linear ME susceptibility α, which has a maximum1 at some T=Tmax, exhibits a minimum at some T=Tmin satisfying 4.2°K