Magnetic exchange interactions in yttrium iron garnet: A fully relativistic first-principles investigation
Oleg I. Gorbatov, Gustav Johansson, Adam Jakobsson, S. Mankovsky, H. Ebert, Igor Di Marco, J. Minář, Corina Etz
Abstract
Magnetic isotropic and Dzyaloshinskii-Moriya interactions in yttrium iron garnet have been obtained by ab initio fully relativistic calculations. The calculated coupling constants are in agreement with available experimental data. Using linear spin-wave theory, we are able to reproduce the experimental magnon spectrum including the spin-wave gap and stiffness. The way to calculate the exchange coupling constants using the Korringa-Kohn-Rostoker formalism for large magnetic systems such as complex oxides is discussed in detail.
Topics & Concepts
MagnonYttrium iron garnetRelativistic quantum chemistryPhysicsYttriumCondensed matter physicsAb initio quantum chemistry methodsAb initioFormalism (music)IsotropyCoupling constantSpin waveExchange interactionMagnetic momentFerromagnetismMaterials scienceAtomic physicsQuantum mechanicsOxideArtMoleculeMetallurgyMusicalVisual artsMagneto-Optical Properties and ApplicationsMagnetic properties of thin filmsMagnetic and transport properties of perovskites and related materials