The intrinsic elasticity of twin walls: Ferrielectric twin walls in ferroelastic CaTiO3

Goncalves-Ferreira, Liliana; Redfern, Simon A. T.; Atacho, Emilio; Salje, Ekhard K. H.
February 2009
Applied Physics Letters;2/23/2009, Vol. 94 Issue 8, p081903
Academic Journal
Computer simulation of ferrielectric domain walls in ferroelastic CaTiO3 demonstrate that twin walls possess almost the same compressibility as the bulk. The Ti–Ti repetition length inside the wall is approximately 0.2% greater than the equivalent lattice parameter of the bulk. A slight reduction in the uniaxial compressibility perpendicular to the twin wall is compared with predictions of various theoretical models which give either large softening or large hardening. Simple spring models predict correctly that any change is expected to be small for relevant potentials far from the ferroelastic transition point.


Related Articles

  • Aging effect in paraelectric state of ferroelectrics: Implication for a microscopic explanation of ferroelectric deaging. Dezhen Xue; Jinghui Gao; Lixue Zhang; Huixin Bao; Wenfeng Liu; Chao Zhou; Xiaobing Ren // Applied Physics Letters;2/23/2009, Vol. 94 Issue 8, p082902 

    Most ferroelectric materials exhibit aging effect (a time-dependent change in physical properties) in their ferroelectric state; however, aging is not reported to exist in the paraelectric state. In this letter we report the existence of a “paraelectric aging effect” in Mn-doped...

  • Bridging domain mechanism for phase coexistence in morphotropic phase boundary ferroelectrics. Rao, Wei-Feng; Wang, Yu U. // Applied Physics Letters;4/30/2007, Vol. 90 Issue 18, p182906 

    Computer modeling and simulation reveals a bridging domain mechanism that explains the phase coexistence commonly observed around the morphotropic phase boundaries of ferroelectric solid solutions. The simulation takes into account the important role of coupled ferroelectric and ferroelastic...

  • Ferroelastic phase in SrBi[sub 2]Ta[sub 2]O[sub 9] and study of the ferroelectric phase-transition dynamics. Kamba, S.; Pokorny´, J.; Porokhonskyy, V.; Petzelt, J.; Moret, M. P.; Garg, A.; Barber, Z. H.; Zallen, R. // Applied Physics Letters;8/5/2002, Vol. 81 Issue 6, p1056 

    Polarized microscope observation of ferroelastic domains in a SrBi[sub 2]Ta[sub 2]O[sub 9] (SBT) single crystal reveals the presence of domains up to T[sub c1]...770 K, which supports the ferroelasticity and Amam symmetry of the intermediate phase between ferroelectric and paraelectric phases....

  • A dynamic view of enzyme catalysis. Aurora Jiménez; Pere Clapés; Ramon Crehuet // Journal of Molecular Modeling;Aug2008, Vol. 14 Issue 8, p735 

    Abstract  Recent experimental advances have shown that enzymes are flexible molecules, and point to a direct link between dynamics and catalysis. Movements span a wide time range, from nano- to milli-seconds. In this paper we introduce two aspects of enzyme flexibility that are treated...

  • Motion of a planar domain wall in the ferroelectric�ferroelastic gadolinium molybdate. Shur, B. Ya.; Rumyantsev, E. L.; Kuminov, V. P.; Subbotin, A. L.; Nikolaeva, E. V. // Physics of the Solid State;Jan99, Vol. 41 Issue 1, p112 

    The lateral motion of a planar domain wall (PDW) in an electric field and the spontaneous rotation of the wall in the initial position after the field is switched off were investigated in the improper ferroelectric-ferroelastic gadolinium molybdate Gd[sub 2] (MoO[sub 4])[sub 3], using optical...

  • Thermodynamics and Kinetics of Switching of Ferroelastic Ferroelectrics at Its Initial Stage. Kukushkin, S. A.; Zakharov, M. A. // Physics of the Solid State;Feb2002, Vol. 44 Issue 2, p345 

    Thermodynamics and kinetics of switching of ferroelastic ferroelectrics (FFs) are studied at the initial (weak-metastability) stage. It is shown that in the switching of a uniaxial FF, the role of the electric field and mechanical stress simultaneously applied to the FF is analogous to that of...

  • Dynamics of a single-planar domain wall in ferroelectric–ferroelastic Gd[sub 2](MoO[sub 4])[sub 3]. Lupascu, Doru C.; Shur, Vladimir Ya.; Shur, Alevtina G. // Applied Physics Letters;4/1/2002, Vol. 80 Issue 13, p2359 

    The field-induced jump-like dynamics of a single planar domain wall are investigated in single crystal uniaxial ferroelectric-ferroelastic Gd[sub 2](MoO[sub 4])[sub 3] containing extended bulk defects. The kind and location of the defects interfering with the free motion of the domain wall...

  • Growth of Er[sub 2](SO[sub 4])[sub 3] · 8H[sub 2]O Crystals and Study of Their Structure and Properties. Soboleva, L. V.; Pietraszko, A.; Kirpichnikova, L. F.; Shuvalov, L. A. // Crystallography Reports;Sep2000, Vol. 45 Issue 5, p721 

    New crystals of the composition Er[sub 2](SO[sub 4])[sub 3] · 8H[sub 2]O have been synthesized by the method similar to that used for synthesis of (CH[sub 3])[sub 2]NH[sub 2]Al(SO[sub 4])[sub 2] · 6H[sub 2]O. The synthesized crystals were studied by the X-ray diffraction method. The...

  • Polaron-type localized states in ferroelectric ferroelastics. Belonenko, M.; Demushkina, E. // Physics of the Solid State;Jun2006, Vol. 48 Issue 6, p1086 

    The problem of a charged particle in an improper ferroelectric ferroelastic is considered. The existence of the ground and first excited states of the discrete spectrum is established and their dependence on the parameters of the problem is investigated using a direct variational method.


Read the Article


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

Try another library?
Sign out of this library

Other Topics