Induced Ferromagnetism at BiFeO3/YBa2Cu3O7 Interfaces

Abstract

Transition metal oxides (TMOs) exhibit many emergent phenomena ranging from high-temperature superconductivity and giant magnetoresistance to magnetism and ferroelectricity. In addition, when TMOs are interfaced with each other, new functionalities can arise, which are absent in individual components. Here, we report results from first-principles calculations on the magnetism at the BiFeO3/YBa2Cu3O7 interfaces. By comparing the total energy for various magnetic spin configurations inside BiFeO3, we are able to show that a metallic ferromagnetism is induced near the interface. We further develop an interface exchange-coupling model and place the extracted exchange coupling interaction strengths, from the first-principles calculations, into a resultant generic phase diagram. Our conclusion of interfacial ferromagnetism is confirmed by the presence of a hysteresis loop in field-dependent magnetization data. The emergence of interfacial ferromagnetism should have implications to electronic and transport properties.

13 pages, 4 figures

References in corpus (9)

• Interface ferromagnetism and orbital reconstruction in BiFeO3- La0.7Sr0.3MnO3 heterostructures
• Magnetic Proximity Effect in Perovskite Superconductor/Ferromagnet Multilayers
• Band Narrowing and Mott Localization in Iron Oxychalcogenides La2O2Fe2O(Se,S)2
• Magnetic proximity effect in $\mathbf{YB}{\mathbf{a}}_2\mathbf{C}{\mathbf{u}}_3{\mathbf{O}}_7/L{\mathbf{a}}_{2/3}\mathbf{C}{\mathbf{a}}_{1/3}\mathbf{Mn}{\mathbf{O}}_3$ and $\mathbf{YB}{\mathbf{a}}_2\mathbf{C}{\mathbf{u}}_3{\mathbf{O}}_7/LaMn{\mathbf{O}}_{3+\delta }$ superlattices
• Suppressed magnetization in La${}_{0.7}$Ca${}_{0.3}$MnO${}_3$/YBa${}_2$Cu${}_3$O${}_{7-\delta }$ superlattices
• Spin Rotation Technique for Non-Collinear Magnetic Systems: Application to the Generalized Villain Model
• Engineering three-dimensional topological insulators in Rashba-type spin-orbit coupled heterostructures
• Tunable magnetic interaction at the atomic scale in oxide heterostructures
• Magnetic properties and atomic structure of La(2/3)Ca(1/3)MnO(3)-YBa(2)Cu(3)O(7) heterointerfaces

Cited by in corpus (3)

• Enhancing interfacial magnetization with a ferroelectric
• Interfacial effects revealed by ultrafast relaxation dynamics in BiFeO${}_3$/YBa${}_2$Cu${}_3$O${}_7$ bilayers
• Structural investigation of (111) oriented (BiFeO3)(1-x)Λ/(LaFeO3)xΛ superlattices by X-ray diffraction and Raman spectroscopy