2007/04/12 by M. Daraktchiev, E. Salje, Ekhard K. H. Salje +4
Earth and Planetary Sciences · Materials Science · Physics and Astronomy · #Ferroelectric and Piezoelectric Materials #High-pressure geophysics and materials #Magnetic and transport properties of perovskites and related materials #cond-mat.mtrl-sci
paper · pdf · doi:10.1103/physrevb.75.134102
published as Phys. Rev. B 75, 134102 (2007) · 20 pages, 4 figures
openalex publication_date 2007/04/12 · arxiv created 2007/09/27 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
The dynamics of transformation twins in SrxBa_1\ensuremath-xSnO3 (x=0.6,0.8) perovskite has been studied by dynamical mechanical analysis in three-point bend geometry. This material undergoes phase transitions from orthorhombic to tetragonal and cubic structures on heating. The mechanical loss signatures of the transformation twins include relaxation and frequency-independent peaks in the orthorhombic, and tetragonal phases, with no observed energy dissipation in the cubic phase. The macroscopic shape, orientation, and relative displacements of twin walls have been calculated from bending and anisotropy energies. The mechanical loss angle and distribution of relaxation time are discussed in terms of bending modes of domain walls.