Hysteresis mediated by a domain wall motion
نویسندگان
چکیده
منابع مشابه
Hysteresis mediated by a domain wall motion
The position of an interface (domain wall) in a medium with random pinning defects is not determined unambiguously by a current value of the driving force even in average. Based on general theory of the interface motion in a random medium we study this hysteresis, different possible shapes of domain walls and dynamical phase transitions between them. Several principal characteristics of the hys...
متن کاملA Domain Wall Model for Ferroelectric Hysteresis
This paper summarizes a mathematical model for characterizing hysteresis in ferroelectric materials. The model is based on the quanti cation of energy required to bend and translate domain walls and is developed in two steps. In the rst, the underlying anhysteretic polarization is quanti ed through constitutive equations derived using Boltzmann statistics. Three anhysteretic models are consider...
متن کاملA Domain Wall Model for Hysteresis in Ferroelastic Materials
We develop a model that quantifies constitutive nonlinearities and hysteresis inherent to ferroelastic compounds, with emphasis placed on shape memory alloys. We formulate the model in two steps. First, we use the Landau theory of phase transitions to characterize the effective Gibbs free energy for both single-crystal and polycrystalline ferroelastics. The resulting nonlinear equations model e...
متن کاملDomain wall motion in nanowires
We investigated the motion of domain walls in ferromagnetic cylindrical nanowires by solving the Landau Lifshitz Gilbert equation numerically for a classical spin model in which energy contributions from exchange, crystalline anisotropy, dipole dipole interactions, and a driving magnetic field are considered. Depending on the diameter, either transverse domain walls or vortex walls are found. A...
متن کاملA diode for ferroelectric domain-wall motion
For over a decade, controlling domain-wall injection, motion and annihilation along nanowires has been the preserve of the nanomagnetics research community. Revolutionary technologies have resulted, like racetrack memory and domain-wall logic. Until recently, equivalent research in analogous ferroic materials did not seem important. However, with the discovery of sheet conduction, the control o...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physica A: Statistical Mechanics and its Applications
سال: 2004
ISSN: 0378-4371
DOI: 10.1016/j.physa.2004.05.014