Influence of strain and oxygen vacancies on the magnetoelectric properties of multiferroic bismuth ferrite

Abstract

The dependencies on strain and oxygen vacancies of the ferroelectric polarization and the weak ferromagnetic magnetization in the multiferroic material bismuth ferrite, BiFeO_3, are investigated using first principles density functional theory calculations. The electric polarization is found to be rather independent of strain, in striking contrast to most conventional perovskite ferroelectrics. It is also not significantly affected by oxygen vacancies, or by the combined presence of strain and oxygen vacancies. The magnetization is also unaffected by strain, however the incorporation of oxygen vacancies can alter the magnetization slightly, and also leads to the formation of Fe^{2+}. These results are discussed in light of recent experiments on epitaxial films of BiFeO_3 which reported a strong thickness dependence of both magnetization and polarization.

9 pages, 3 figures

References in corpus (2)

• First-principles study of spontaneous polarization in multiferroic BiFeO${}_3$
• Weak ferromagnetism and magnetoelectric coupling in bismuth ferrite

Cited by in corpus (13)

• The beta Phase of Multiferroic Bismuth Ferrite and its beta-gamma Metal-Insulator Transition
• Origin of magnetoelectric behavior in BiFeO${}_3$
• Effect of epitaxial strain on the spontaneous polarization of thin film ferroelectrics
• Suppressed dependence of polarization on epitaxial strain in highly polar ferroelectrics
• Effect of epitaxial strain on ferroelectric polarization in multiferroic BiFeO3 films
• Origin of ferroelectricity in the multiferroic barium fluorides BaMF4
• Electric-field switchable magnetization via the Dzyaloshinskii-Moriya interaction: FeTiO_3 versus BiFeO_3
• Magnetic coupling in CoCr_2O_4 and MnCr_2O_4: an LSDA+U study
• Epitaxial thin films of the multiferroic double perovskite Bi2FeCrO6 grown on (100)-oriented SrTiO3 substrates: Growth, characterization, and optimization
• Ab-initio electronic and magnetic structure in La_0.66Sr_0.33MnO_3: strain and correlation effects
• Manipulating Multiple Order Parameters via Oxygen Vacancies: The case of Eu0.5Ba0.5TiO3-δ
• Optical signatures of defects in BiFeO${}_3$
• Terahertz spin-orbit torque as a drive of spin dynamics in the insulating antiferromagnet Cr${}_2$O${}_3$