An optimization-based “phase field” model for polycrystalline ferroelectrics

Li, F. X.; Zhou, X. L.; Soh, A. K.
April 2010
Applied Physics Letters;4/12/2010, Vol. 96 Issue 15, p152905
Academic Journal
An optimization-based computational model is proposed to study domain evolution in polycrystalline ferroelectrics composed of numerous grains, each of which consists of multiple domains. Domain switching is realized by an optimization process to minimize the free energy of each grain. Similar to phase field modeling, no priori domain-switching criterion is imposed in the proposed model. Moreover, by focusing on the volume fractions of domains only, the computational complexity of this model becomes much smaller and the domain textures evolution can be captured. Simulation results on both tetragonal and rhombohedral lead titanate zirconate ceramics illustrate the efficiency of this model.


Related Articles

  • Modeling on domain switching in ferroelectric ceramics near the morphotropic phase boundary. Li, F. X.; Li, Y. W. // Journal of Applied Physics;Jun2009, Vol. 105 Issue 12, p124105 

    In this paper, domain switching in ferroelectric ceramics near the morphotropic phase boundary (MPB), where tetragonal phase and rhombohedral phase coexist, is analyzed by a micromechanical model using an inverse-pole-figure (IPF) method. Charge screening effect in ferroelectric ceramics is...

  • Effect of grain boundary on the electromechanical response of ferroelectric polycrystals. Shu, Weilin; Wang, Jie; Zhang, Tong-Yi // Journal of Applied Physics;Sep2012, Vol. 112 Issue 6, p064108 

    The effect of grain boundaries on the electromechanical response of a ferroelectric polycrystal subjected to an electric field or stress is investigated numerically by using a phase field model. The grain boundaries in the phase field model are regarded as dielectrics in which the ferroelectric...

  • Varistor effect in semiconductor ferroelectrics. Pavlov, A. N.; Raevskiı, I. P. // Technical Physics;Dec97, Vol. 42 Issue 12, p1390 

    This paper treats the effect of an external field on the magnitude of potential barriers and the potential contour near a charged boundary between crystallites in polycrystalline ferroelectric semiconductors. It is shown that this effect depends on the mutual directions of the external field and...

  • Transport properties of LaTiO[sub 3+x] films and heterostructures. Schmehl, A.; Lichtenberg, F.; Bielefeldt, H.; Mannhart, J.; Schlom, D. G. // Applied Physics Letters;5/5/2003, Vol. 82 Issue 18, p3077 

    We report on the transport properties of LaTiO[sub 3 + ε and LaTiO[sub 3.5] films. The LaTiO[sub 3 +ε] samples show metallic transport and several samples exhibit a hysteretic drop of resistance during cooldown at ∼240 K. The ferroelectric LaTiO[sub 3.5] samples, grown in capacitor...

  • Streamline Simulation Technology: Trends and Applications in Oil Industry. Al-Najem, Abdullah A.; Siddiqui, Shameem; Soliman, Mohamed Y. // International Journal of Applied Engineering Research;2013, Vol. 8 Issue 7, p797 

    This paper presents a comprehensive review of the diverse applications of streamline simulation technology in petroleum industry. This paper offers a comprehensive review of the major development in this area. This work involved the review of more than 200 technical papers and gives a...

  • The berth allocation problem with stochastic vessel handling times. Karafa, Jeffery; Golias, Mihalis; Ivey, Stephanie; Saharidis, Georgios; Leonardos, Nikolaos // International Journal of Advanced Manufacturing Technology;Mar2013, Vol. 65 Issue 1-4, p473 

    In this paper, the berth allocation problem with stochastic vessel handling times is formulated as a bi-objective problem. To solve the resulting problem, an evolutionary algorithm-based heuristic and a simulation-based Pareto front pruning algorithm is proposed. Computational examples show that...

  • An Analysis of the Alias Method for Discrete Random-Variate Generation. Smith, J. Cole; Jacobson, Sheldon H. // INFORMS Journal on Computing;Summer2005, Vol. 17 Issue 3, p321 

    This paper introduces and studies an optimization problem related to the alias method for discrete random-variate generation. The alias method is an efficient method to generate random variates from a discrete probability distribution. The efficiency of the alias method can be improved by...

  • Layered optimization strategy of satellite constellation configuration by improved NSGA-II algorithm. CHANG Hui; HU Xiulin // Journal of Huazhong Normal University;2013, Vol. 52 Issue 1, p40 

    For the huge computing cost of integrated design method of Satellite constellation system, layered optimization strategy of satellite constellation configuration was proposed. The core of new strategy is improved non-dominated sorting genetic algorithm II (NSGA-II) in which the non-dominated...

  • Computing Optimal Stochastic Portfolio Execution Strategies: A Parametric Approach Using Simulations. Moazeni, Somayeh; Coleman, Thomas F.; Yuying Li // AIP Conference Proceedings;9/30/2010, Vol. 1281 Issue 1, p342 

    Computing optimal stochastic portfolio execution strategies under appropriate risk consideration presents great computational challenge. We investigate a parametric approach for computing optimal stochastic strategies using Monte Carlo simulations. This approach allows reduction in computational...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics