“…Thus, the magnetic field . In an electrostrictive material, the strain ε is proportional to E 2 , rather than E. As shown in our previous report [36], when E changes between 0 kV/cm and 10 kV/cm, ∆c/c PMN-PT is found to change linearly with E, indicating a piezoelectric nature of the electric-field-induced strain. Thus, the contribution from electrostriction should be very small.…”