Magnetic and electric phase control in epitaxial EuTiO$_3$ from first   principles
  We propose a design strategy - based on the coupling of spins, optical phonons, and strain - for systems in which magnetic (electric) phase control can be achieved by an applied electric (magnetic) field. Using first-principles density-functional theory calculations, we present a realization of this strategy for the magnetic perovskite EuTiO$_3$. 
Craig J. Fennie and Karin M. Rabe