title: Temperature-dependent magnetoelectric effect from first principles.
abstract: We show that nonrelativistic exchange interactions and spin fluctuations can give rise to a linear magnetoelectric effect in collinear antiferromagnets at elevated temperatures that can exceed relativistic magnetoelectric responses by more than 1 order of magnitude. We show how symmetry arguments, ab initio methods, and Monte Carlo simulations can be combined to calculate temperature-dependent magnetoelectric susceptibilities entirely from first principles. The application of our method to Cr2O3 gives quantitative agreement with experiment.
authors.affiliation: Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, The Netherlands.
authors.forename: Maxim
authors.initials: M
authors.lastname: Mostovoy
authors.forename: Andrea
authors.initials: A
authors.lastname: Scaramucci
authors.forename: Nicola A
authors.initials: NA
authors.lastname: Spaldin
authors.forename: Kris T
authors.initials: KT
authors.lastname: Delaney