Analog of Magnetoelectric Effect in High-Tc Granular Superconductors
  We propose the existence of an electric-field induced nonlinear magnetization in a weakly coupled granular superconductor due to time-parity violation. As the field increases the induced magnetization passes from para- to dia-magnetic behavior. We discuss conditions under which this effect could be experimentally measured in high-temperature superconductors. 
Sergei A. Sergeenkov (JINR, Dubna) and Jorge V. Jose (Northeastern U.,   Boston)