Tuning order-by-disorder multiferroicity in CuO by doping
  The high Curie temperature multiferroic compound, CuO, has a quasidegenerate magnetic ground state that makes it prone to manipulation by the so called ``order-by-disorder'' mechanism. First principle computations supplemented with Monte Carlo simulations and experiments show that isovalent doping allows to stabilize the multiferroic phase in non-ferroelectric regions of the pristine material phase-diagram with experiments reaching a 250% widening of the ferroelectric temperature window with 5% of Zn doping. Our results allow to validate the importance of a quasidegenerate ground state on promoting multiferroicity on CuO at high temperatures and open a path to the material engineering of new multiferroic materials. 
J. Hellsvik, M. Balestieri, T. Usui, A. Stroppa, A. Bergman, L.   Bergqvist, D. Prabhakaran, O. Eriksson, S. Picozzi, T. Kim...
cond-mat.mtrl-sci cond-mat.str-el