Large magnetoelectric effect in ferroelectric/piezomagnetic heterostructures

Authors

Pavel Lukashev, University of Nebraska-LincolnFollow
Kirill D. Belashchenko, University of Nebraska-LincolnFollow
Renat F. Sabirianov, University of Nebraska at OmahaFollow

Document Type

Article

Date of this Version

2011

Citation

PHYSICAL REVIEW B 84, 134420 (2011); DOI: 10.1103/PhysRevB.84.134420

Comments

Copyright 2011 American Physical Society. Used by permission.

Abstract

We present results of the first-principles calculations on the large magnetoelectric effect in ferroelectric/ piezomagnetic multilayers. We consider thin-film layered heterostructures of typical ferroelectrics, such as PbTiO₃, with piezomagnetic (PzM) Mn-based antiperovskites, such as Mn3GaN. The atomic displacements induced by the FE polarization as well as mechanical stress at the interface break the triangular magnetic symmetry of the PzM phase producing net magnetization in the system. The induced magnetization can be controlled by changing the direction of polarization in the ferroelectric phase. Our calculations show that reversal of the polarization results in change of the net magnetization in the system by more than 50%.