Magnetic Field Control of Cycloidal Domains and Electric Polarization in Multiferroic BiFeO_{3}.
Phys Rev Lett
; 120(14): 147203, 2018 Apr 06.
Article
in En
| MEDLINE
| ID: mdl-29694132
ABSTRACT
The magnetic field induced rearrangement of the cycloidal spin structure in ferroelectric monodomain single crystals of the room-temperature multiferroic BiFeO_{3} is studied using small-angle neutron scattering. The cycloid propagation vectors are observed to rotate when magnetic fields applied perpendicular to the rhombohedral (polar) axis exceed a pinning threshold value of â¼5 T. In light of these experimental results, a phenomenological model is proposed that captures the rearrangement of the cycloidal domains, and we revisit the microscopic origin of the magnetoelectric effect. A new coupling between the magnetic anisotropy and the polarization is proposed that explains the recently discovered magnetoelectric polarization perpendicular to the rhombohedral axis.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Type of study:
Qualitative_research
Language:
En
Journal:
Phys Rev Lett
Year:
2018
Document type:
Article
Affiliation country:
Hungary