scholarly journals Domain Wall Motions in a Near-Morphotropic Pb(Zr,Ti)O3 Under Mechanical Stress Observed by In Situ Piezoresponse Force Microscopy

2019 ◽  
Vol 57 (1) ◽  
pp. 38-42 ◽  
Author(s):  
Kwanlae Kim
Keyword(s):  
Domain Wall ◽  
Mechanical Stress ◽  
Piezoresponse Force Microscopy ◽  
Force Microscopy

scholarly journals Structure and Dynamics of Ferroelectric Domains in Polycrystalline Pb(Fe1/2Nb1/2)O3

Materials ◽  
2019 ◽  
Vol 12 (8) ◽  
pp. 1327 ◽  
Author(s):  
Ursic ◽  
Bencan ◽  
Prah ◽  
Dragomir ◽  
Malic
Keyword(s):  
Domain Wall ◽  
Ambient Temperature ◽  
Domain Structure ◽  
Domain Walls ◽  
Domain Switching ◽  
Piezoresponse Force Microscopy ◽  
Paraelectric Phase Transition ◽  
Force Microscopy ◽  
Ferroelectric Domains

A complex domain structure with variations in the morphology is observed at ambient temperature in monoclinic Pb(Fe1/2Nb1/2)O3. Using electron microscopy and piezoresponse force microscopy, it is possible to reveal micrometre-sized wedge, lamellar-like, and irregularly shaped domains. By increasing the temperature, the domain structure persists up to 80 °C, and then starts to disappear at around 100 °C due to the proximity of the ferroelectric–paraelectric phase transition, in agreement with macroscopic dielectric measurements. In order to understand to what degree domain switching can occur in the ceramic, the mobility of the domain walls was studied at ambient temperature. The in situ poling experiment performed using piezoresponse force microscopy resulted in an almost perfectly poled area, providing evidence that all types of domains can be easily switched. By poling half an area with 20 V and the other half with −20 V, two domains separated by a straight domain wall were created, indicating that Pb(Fe1/2Nb1/2)O3 is a promising material for domain-wall engineering.

Ferroelectric domain-wall logic units

2021 ◽  
Author(s):  
Jing Wang ◽  
Jing Ma ◽  
Houbing Huang ◽  
Ji Ma ◽  
Hasnain Jafri ◽  
...  
Keyword(s):  
Domain Wall ◽  
Electric Field ◽  
Domain Walls ◽  
Logic Gates ◽  
Piezoresponse Force Microscopy ◽  
Ferroelectric Domain ◽  
Conduction Path ◽  
Conductive Atomic Force Microscopy ◽  
Flexible Control ◽  
Force Microscopy

Abstract The electronic conductivities of ferroelectric domain walls have been extensively explored over the past decade for potential nanoelectronic applications. However, the realization of logic devices based on ferroelectric domain walls requires reliable and flexible control of the domain-wall configuration and conduction path. Here, we demonstrate electric-field-controlled stable and repeatable on-and-off switching of conductive domain walls within topologically confined vertex domains naturally formed in self-assembled ferroelectric nano-islands. Using a combination of piezoresponse force microscopy, conductive atomic force microscopy, and phase-field simulations, we show that on-off switching is accomplished through reversible transformations between charged and neutral domain walls via electric-field-controlled domain-wall reconfiguration. By analogy to logic processing, we propose programmable logic gates (such as NOT, OR, AND and their derivatives) and logic circuits (such as fan-out) based on reconfigurable conductive domain walls. Our work provides a potentially viable platform for programmable all-electric logic based on a ferroelectric domain-wall network with low energy consumption.

Differential Domain Wall Propagation in Y-Shaped Permalloy Nanowire Devices

SPIN ◽  
2016 ◽  
Vol 06 (01) ◽  
pp. 1650006 ◽  
Author(s):  
Bipul Das ◽  
Ting-Chieh Chen ◽  
Deng-Shiang Shiu ◽  
Lance Horng ◽  
Jong-Ching Wu
Keyword(s):  
Domain Wall ◽  
Magnetic Force ◽  
Magnetic Domain ◽  
Topological Defects ◽  
Circular Disk ◽  
Geometrical Shape ◽  
Magnetic Domain Wall ◽  
Force Microscopy ◽  
Junction Structure

Here, we report an investigation of magnetic domain wall (DW) evolution and propagation in Y-shaped permalloy (Py) nanowire (NW) devices. The devices are fabricated using standard electron-beam lithography technique. Each device consists of three connected NWs that form a Y-junction structure with one branch connecting either symmetrically or asymmetrically to a circular disk for DW nucleation. The DW dynamics in the devices are studied by in situ magnetic force microscopy (MFM) by pinning the DWs to triangular notches at each branch of the two devices. We observe that the DW injection field values differ depending on whether they are connected to the circular disks symmetrically or asymmetrically. However, after they pass the Y-junctions, a selection is made by the DWs to propagate easily either through both or through only one particular outgoing branch of the devices. The experimental observations are analyzed by micromagnetic simulation. It can be inferred from the results that the influence of detailed geometrical shape of the devices leads to significantly different interactions among the innate topological defects and the notches with the injected DWs.

scholarly journals Polarization Domain Dynamics of Barium Titanate Ultrathin Films Using Piezoresponse Force Microscopy.

2021 ◽  
Author(s):  
gregory salamo ◽  
Mohammad Zamani-Alavijeh ◽  
Timothy Morgan ◽  
Andrian Kuchuk
Keyword(s):  
Thin Films ◽  
Barium Titanate ◽  
Domain Wall ◽  
Electric Field ◽  
Piezoresponse Force Microscopy ◽  
Material Constants ◽  
Force Microscopy ◽  
Atomic Force ◽  
Domain Dynamics ◽  
Limiting Velocity

Abstract Piezoresponse force microscopy is used to study the velocity of the polarization domain wall in ultrathin ferroelectric barium titanate films grown on strontium titanate substrates by molecular beam epitaxy. The electric field due to the cone of the atomic force microscope tip is proposed as the dominant electric field of the tip in thin films for domain expansion at lateral distances greater than about one tip diameter away from the tip. The velocity of the domain wall under the applied electric field by the tip in barium titanate for thin films (less than 40 nm) followed an expanding process given by Merz’s law. The material constants in a fit of the data to Merz’s law for very thin films are reported as about 4.2 KV/cm for activation field, Ea, and 0.05 nm/s for limiting velocity, v∞. These material constants showed a dependence on the level of strain in the films but no fundamental dependence on thickness.

High Resolution Piezoresponse Force Microscopy Study of Self-Assembled Peptide Nanotubes

MRS Advances ◽  
2016 ◽  
Vol 2 (02) ◽  
pp. 63-69
Author(s):  
Maxim Ivanov ◽  
Ohheum Bak ◽  
Svitlana Kopyl ◽  
Semen Vasilev ◽  
Pavel Zelenovskiy ◽  
...  
Keyword(s):  
High Resolution ◽  
Piezoresponse Force Microscopy ◽  
Microscopy Study ◽  
Radial Component ◽  
Peptide Nanotubes ◽  
Force Microscopy ◽  
Reduced Graphene ◽  
Axial Polarization ◽  
Heating Up

ABSTRACT Peptide nanotubes based on short dipeptide diphenylalanine (FF) attract a lot of attention due to their unique physical properties ranging from strong piezoelectricity to extraordinary mechanical rigidity. In this work, we present the results of high-resolution Piezoresponse Force Microscopy (PFM) measurements in FF microtubes prepared from the solution. First in-situ temperature measurements show that the effective shear piezoelectric coefficient d15 (proportional to axial polarization) significantly decreases (to about half of the initial value) under heating up to 100 oC. The piezoresponse becomes inhomogeneous over the surface being higher in the center of the tubes. Further, PFM study of a composite consisting of FF microtubes and reduced graphene oxide (rGO) was performed. We show that piezoelectric properties of peptide microtubes are significantly modified and radial (vertical) piezoresponse appears in the presence of rGO as confirmed via PFM analysis. The results are rationalized in terms of molecular approach in which π – π molecular interaction between rGO and dipeptide is responsible for the appearance of radial component of polarization in such hybrid structures.

Sign in / Sign up

Export Citation Format

Share Document