Blanc SIMI 4 - Blanc - SIMI 4 - Physique des milieux condensés et dilués

Multiferroic domain walls – MULTIDOLLS

Submission summary

Multiferroics are materials in which several physical order parameters coexist, and of particular interest are the magnetic ferroelectrics where the two orders are coupled. These can potentially lead to breakthroughs in information technology and as such, they have been the subject of a spectacular revival in the last ten years. Bismuth ferrite BiFeO3 is the most popular of these materials because it is a strong ferroelectric and an antiferromagnet at room-temperature presenting an intimate coupling between the polarization and antiferromagnetic vectors. Very recently, some attention has been focused on the multiferroic domain walls which have some specific properties of great interest including an uncompensated magnetic moment, a reasonable conductance as well as promising photovoltaic properties. Thus, these are magnetically charged solitons which can be generated and moved with an applied electric field. This offers exciting opportunities to control these nanometric objects at will in order to use their properties of conductance, ferromagnetism or sensitivity to light. The present proposal aims at studying in detail, on a single domain wall, the ensemble of these properties and their coupling, in order to demonstrate their potential for possible device applications.

Project coordination

Michel Viret (CEA/DSM/IRAMIS/SPEC) –

The author of this summary is the project coordinator, who is responsible for the content of this summary. The ANR declines any responsibility as for its contents.


UMPhy Unité Mixte de Physique CNRS/Thales
IPCMS Institut de Physique et Chimie des Matériaux de Strasbourg
Université Paris 11 Laboratoire de Physique des Solides

Help of the ANR 553,218 euros
Beginning and duration of the scientific project: October 2012 - 36 Months

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