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Giant direct magnetoelectric effect in strained multiferroic heterostructures

2012; American Physical Society; Volume: 85; Issue: 14 Linguagem: Inglês

10.1103/physrevb.85.140401

1550-235X

Pierre‐Eymeric Janolin, N. A. Pertsev, David Sichuga, L. Bellaïche,

Magnetic and transport properties of perovskites and related materials

The direct magnetoelectric (ME) effect mediated by lattice strains induced in a ferroelectric film by a ferromagnetic substrate is evaluated using first-principles-based calculations. To that end, the strain sensitivity of ferroelectric polarization and the film permittivity are calculated as a function of the in-plane biaxial strain for Pb(Zr0.52Ti0.48)O3 films under various depolarizing fields. It is found that the ME voltage coefficient varies nonmonotonically with this strain and may reach giant values exceeding 100 Vcm-1 Oe-1 over a strain range that can be controlled through the electrical boundary conditions.