2024/07/25 by A. Bussmann‐Holder, Reinhard K. Kremer, Bussmann-Holder, Annette +5
Materials Science · Physics and Astronomy · #Magnetic and transport properties of perovskites and related materials #Advanced Condensed Matter Physics #Electronic and Structural Properties of Oxides
paper · pdf · doi:10.48550/arxiv.2407.17878
The perovskite oxide EuTiO3 (ETO) has attracted increased scientific interest due to its potential multiferroic properties and magnetic activity above and below its structural phase transition at TS=282K. Various experiments have indirectly evidenced that this transition is neither a cubic tetragonal nor the only one occurring in ETO. Here, we show new results demonstrating two further instabilities below TS based on lattice dynamics and spin-phonon interactions combined with a Landau free energy model with coupled order parameters. The new transition temperatures perfectly agree with available experimental data where further instabilities have been anticipated.