Strain, stress and lattice dynamics of multiferroic systems (B08)

• Subject Area: Experimental Condensed Matter Physics ; Theoretical Condensed Matter Physics
• Term: from 2008 to 2019
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 31047526

We focus on the experimental characterization of the recently discovered periodic-aperiodic interface of the quasicrystalline barium titanate phase on Pt(111). Stress and phonon measurements are planned to charac-terize the role of interfacial stress and of low-energy excitations for the formation of the quasicrystalline phase. Quasicrystalline barium titanate will be used as a template for the growth of ferromagnetic atomic layers to produce for the first time quasicrystalline multiferroic composites. This defines a new class on materials, where the role of symmetry and strain for magnetic anisotropy, magnetoelastic and multiferroic coupling will be elucidated.

• DFG Programme: Collaborative Research Centres
• Subproject of: SFB 762: Functionality of Oxide Interfaces
• Applicant Institution: Martin-Luther-Universität Halle-Wittenberg
• Co-Applicant Institution: Max-Planck-Institut für Mikrostrukturphysik
• Project Heads: Dr. Dirk Sander; Professor Dr. Valeri Stepanyuk, until 12/2015; Professor Dr. Wolf Widdra