Volume 99, Number 5, September 2012
|Number of page(s)||5|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||12 September 2012|
On the problem of coexistence of the weak ferromagnetism and the spin flexoelectricity in multiferroic bismuth ferrite
1 A.M. Prokhorov General Physics Insitute of the Russian Academy of Science - Vavilova 38, Moscow, 119991, Russia
2 P.N. Lebedev Physical Institute of the Russian Academy of Science - Leninskiy prospekt, 53, Moscow, 119991, Russia
3 Moscow Institute of Physics and Technology (State University) - Institutskii per. 9, Dolgoprudny, 141700, Russia
4 Physics Department, M.V. Lomonosov Moscow State University, MSU - Leninskie gori 119991, Moscow, Russia
(a) Present address: Physics Department, M.V. Lomonosov MSU - Leninskie gori, 119991, Moscow, Russia; email@example.com
Received: 27 July 2012
Accepted: 13 August 2012
On the example of the prototypical multiferroic bismuth ferrite the microscopic origin of the spin flexoelectricity responsible for the spin cycloid ordering is analyzed. It is shown how the three basic structural distortions corresponding to the frozen-phonon modes of an ideal perovskite lattice result in the coexistence of the spin canting and the spin cycloidal ordering. On the basis of a simple formula for the antisymmetric Dzyaloshinskii-Moriya superexchange the inhomogenous magnetoelectric contribution to the theromodynamic potential is derived and the values of the microscopic parameters corresponding to the spin canting and the spin cycloid are determined.
PACS: 75.85.+t – Magnetoelectric effects, multiferroics
© EPLA, 2012
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.