Premium
The magnetoelectric effect and double‐perovskite structure
Author(s) -
Bahoosh Safa Golrokh,
Wesselinowa Julia M.,
Trimper Steffen
Publication year - 2012
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.201248059
Subject(s) - condensed matter physics , multiferroics , phonon , magnetization , coupling (piping) , polarization (electrochemistry) , magnetoelectric effect , magnetic field , materials science , phase transition , phase (matter) , physics , ferroelectricity , chemistry , quantum mechanics , dielectric , optoelectronics , metallurgy
Based on a microscopic model with a biquadratic magnetoelectric coupling the properties of Bi 2 NiMnO 6 thin films are investigated. Using Green's functions the phonon spectrum is calculated which is determined by the polarization and the magnetization. The phonon energy and its damping offer a kink at the magnetic phase transition temperature. The phonon energy is enhanced if an external magnetic field is increased, whereas, the damping of the phonons decreases. The observed behavior is a strong evidence for a magnetoelectric coupling. The relevance of our approach for other multiferroics is discussed.