Origin of nonlinear magnetoelectric response in rare-earth orthoferrite perovskite oxides

Abstract

We report a theoretical study of the non-linear magnetoelectric response of GdFeO${}_3$ through an analytical approach combined with a Heisenberg model which is fitted against first-principles calculations. Our theory reproduces the non-linear change of polarization under applied magnetic field reported experimentally such that it allows to analyze the origin of the large responses in the different directions. We show that the non-linear character of the response in these materials originates from the fact that the antiferromagnetic order of Gd atoms changes non-linearly with respect to the applied magnetic field. Our model can be generalized to other materials in which the antiferromagnetic ordering breaks inversion symmetry.

References in corpus (5)

• Restoring the density-gradient expansion for exchange in solids and surfaces
• Generalized gradient approximation for solids and their surfaces
• TB2J: a python package for computing magnetic interaction parameters
• Realization of giant magnetoelectricity in helimagnets
• Magnetic phase diagram of rare-earth orthorhombic perovskite oxides

Cited by in corpus (4)

• Role of Dy on the magnetic properties of orthorhombic DyFeO3
• Lattice dynamics and mixing of polar phonons in the rare-earth orthoferrite TbFeO${}_3$
• Room Temperature Dy Spin-Flop Switching in Strained DyFeO3 Thin Films
• Spin and lattice dynamics at the spin-reorientation transitions in the rare-earth orthoferrite Sm${}_{0.55}$Tb${}_{0.45}$FeO${}_3$