Laboratoire Léon Brillouin
UMR12 CEA-CNRS, Bât. 563 CEA Saclay
91191 Gif sur Yvette Cedex, France
BiFeO3 is a multiferroic materials in which ferroelectric and anti-ferromagnetic orders coexist well above room temperature (TN=643 K, TC=1093 K), with a high polarization (over 100 μC/cm2 ). We have shown at the LLB by neutron diffraction that these two order parameters interact and that the magnetization of the material can be modified by the application of an electric field. This opens the way towards the implementation of this material in spintronic devices in which magnetization could be controlled by a small electrical voltage rather than by currents or magnetic fields.
Although magnetoelectric materials have been known for decades, no direct proof of the coupling between the two co-existing physical effects had been reported in the literature. We have demonstrated this magneto-electric coupling by neutron diffraction on BiFeO3 single crystals. One key to success was the exceptional quality of the high purity single crystals which are magnetically and electrically single domain. More...
• Électronique et optique du futur › Nanomagnétisme et oxydes : spintronique, matériaux multiferroïques et nouveaux capteurs magnétiques
• IRAMIS: Saclay Institute of Matter and Radiation • Laboratoire Léon Brillouin (LLB) • Leon Brillouin Laboratory (LLB)
• Diffraction monocristaux • Groupe Interfaces et Matériaux • Groupe Trois Axes • Interfaces and materials • Single crystal diffraction • Triple axis group
• Neutrons • Reflectivity • Single crystal diffraction • Neutrons • Diffractomètres pour monocristal (5C1, 5C2, 6T2) • Réflectométrie neutronique