Temperature-magnetic field phase diagram deduced from the neutron diffraction measurements. See full paper for details.
V. Balédent, A. Vaunat, S. Petit, L. Nataf, S. Chattopadhyay, S. Raymond, and P. Foury-Leylekian
In this paper, we investigate the physical properties of the type-II multiferroic GdMn2O5 material by means of neutron scattering, electric polarization, and magnetization measurements. A complex (T,H) phase diagram shows up, with especially a field-induced magnetic transition around 11 T at low temperature. The high-field phase is accompanied by an additional electric polarization along both the a and b directions, as authorized by symmetry, but never observed experimentally up to now. While the magnetic properties recover their initial states after driving the field back to zero, the polarization along a shows a significant increase. This behavior is observed for all directions of the magnetic field. It constitutes a novel and striking manifestation of the magnetoelectric coupling, resulting in the establishment of a new ground state at zero magnetic field.
• Matériaux des nouvelles technologies pour l’énergie › Conversion de l'énergie Systèmes complexes et transition énergétique Materials for new energy technologies
• Laboratoire Léon Brillouin (LLB) • Leon Brillouin Laboratory (LLB)
• Nouvelles frontières dans les matériaux quantiques - NFMQ
• Neutrons • Activités instrumentales nationales et internationales du LLB - National and internatonial instrumental activities at the LLB • Neutrons • Single crystal diffraction