Rutgers Center for Emergent Materials and Department of Physics and Astronomy, Rutgers University, 136 Frelinghuysen Road, Piscataway, New Jersey 08854, USA.
Phys Rev Lett. 2010 Aug 27;105(9):097201. doi: 10.1103/PhysRevLett.105.097201. Epub 2010 Aug 23.
From our investigation of magnetoelectric properties of a multiferroic phase in Eu0.75Y0.25MnO3 competing with a weak-ferromagnetic phase in magnetic fields, we found intriguing hysteretic behaviors of physical properties with variation of temperature and magnetic field. These hysteretic behaviors arise from the kinetic arrest (dearrest) processes of the first-order multiferroic-weak-ferromagnetic transition, resulting in frozen (melted) magnetoelectric glass states with coexisting two phases. Tipping the delicate balance of two competing phases by applying electric and magnetic fields leads to a remarkable control of magnetization and electric polarization.
通过对 Eu0.75Y0.25MnO3 中与弱铁磁相竞争的多铁相的磁电特性进行研究，我们发现了有趣的物理性质随温度和磁场变化的滞后行为。这些滞后行为源于一级多铁-弱铁磁转变的动力学阻滞（去阻滞）过程，导致共存两相的冻结（熔化）磁电玻璃态。通过施加电场和磁场来改变两种竞争相之间的微妙平衡，可以显著控制磁化强度和极化强度。
