Segmental front line dynamics of randomly pinned ferroelastic domain walls
arXiv:1902.04449 · doi:10.1103/PhysRevMaterials.2.013603
Abstract
Dynamic mechanical analysis (DMA) measurements as a function of temperature, frequency, and dynamic force amplitude are used to perform a detailed study of the domain wall motion in LaAlO3. In previous DMA measurements Harrison et al.[Phys. Rev. B69,144101(2004)] found evidence for dynamic phase transitions of ferroelastic domain walls in LaAlO3. In the present work we focus on the creep-to-relaxation region of domain wall motion using two complementary methods. We determine, in addition to dynamic susceptibility data, waiting time distributions of strain jerks during slowly increasing stress. The present dynamic susceptibility data can be well fitted with a power law, where a crossover from stochastic DW motion to the pinned regime is well described using the scaling function of Fedorenko et al.[Phys. Rev. B70, 224104(2004)].
References in corpus (11)
- Fractal dimension and size scaling of domains in thin films of multiferroic BiFeO3
- Growing length and time scales in glass forming liquids
- Pinning and Sliding of Driven Elastic Systems: from Domain Walls to Charge Density Waves
- Exactly solvable model of avalanches dynamics for Barkhausen crackling noise
- Hysteretic dynamics of domain walls at finite temperatures
- Creep dynamics of elastic manifolds via exact transition pathways
- Quantitative scaling of magnetic avalanches
- Glassy Motion of Elastic Manifolds
- Dielectric response due to stochastic motion of pinned domain walls
- Multiscaling analysis of ferroelectric domain wall roughness
- Giant domain wall response of highly twinned ferroelastic materials