scholarly journals Atomic-scale mapping of dipole frustration at 90° charged domain walls in ferroelectric PbTiO3 films

2014 ◽  
Vol 4 (1) ◽  
Author(s):  
Y. L. Tang ◽  
Y. L. Zhu ◽  
Y. J. Wang ◽  
W. Y. Wang ◽  
Y. B. Xu ◽  
...  
Keyword(s):  
Domain Walls ◽  
Atomic Scale

Atomic-scale study of electric dipoles near charged and uncharged domain walls in ferroelectric films

2007 ◽  
Vol 7 (1) ◽  
pp. 57-61 ◽  
Author(s):  
Chun-Lin Jia ◽  
Shao-Bo Mi ◽  
Knut Urban ◽  
Ionela Vrejoiu ◽  
Marin Alexe ◽  
...  
Keyword(s):  
Domain Walls ◽  
Atomic Scale ◽  
Ferroelectric Films ◽  
Electric Dipoles

scholarly journals Probing the Dynamics of Topologically Protected Charged Ferroelectric Domain Walls with the Electron Beam at the Atomic Scale

2020 ◽  
Vol 26 (S2) ◽  
pp. 3030-3032
Author(s):  
Michele Conroy ◽  
Kalani Moore ◽  
Eoghan O'Connell ◽  
Lewys Jones ◽  
Clive Downing ◽  
...  
Keyword(s):  
Electron Beam ◽  
Domain Walls ◽  
Ferroelectric Domain ◽  
Atomic Scale

scholarly journals Atomic-Scale Investigations of Domain Walls in Polycrystalline BiFeO3

2017 ◽  
Vol 23 (S1) ◽  
pp. 1618-1619
Author(s):  
G. Drazic ◽  
A. Bencan ◽  
D. Damjanovic ◽  
T. Rojac
Keyword(s):  
Domain Walls ◽  
Atomic Scale

Inspection and Manipulation of Ferroelectrics on the Nanometer Scale

1999 ◽  
Vol 574 ◽  
Author(s):  
L. M. Eng
Keyword(s):  
Domain Walls ◽  
Near Field ◽  
High Vacuum ◽  
Polarization Vector ◽  
Optical Microscope ◽  
Ferroelectric Materials ◽  
Ultra High Vacuum ◽  
Atomic Scale ◽  
Dynamic Force ◽  
Force Microscopy

AbstractThe increasing interest in scanning probe instruments (SPM) stems from the outstanding possibilities in measuring electric, magnetic, optical, and structural properties of surfaces and surface layers down to the molecular and atomic scale. For the inspection of ferroelectric materials both the scanning force microscope (SFM) and the scanning near-field optical microscope (SNOM) are promising techniques revealing information on the polarization vector and the electric field induced stress within a crystal. Polarization sensitive modes are discussed as is friction force microscopy, dynamic force microscopy (DFM) and voltage modulated SFM. From these measurements, 180° domain walls (c-domains) are resolved down to 4 nm, while 3-dimensional polarization mapping in ferroelectric BaTiO3 ceramics reveals a 25 nm resolution. On the other hand, non-contact DFM measurements in ultra-high vacuum are able to resolve ferroelectric surfaces down to the atomic scale. Then also the chemical heterogeneity at the sample surface is differentiated from ferroelectric domains down to a 5 nm lateral resolution, taking advantage of the short range chemical forces. SNOM in contrast probes the optical properties of ferroelectric crystals both in transmission and reflection. Here image contrast arises from changes in the refractive index between different domains as well as at domain walls. In addition, SPM instruments are used for the local modification of ferroic samples by applying a relatively high voltage pulse to the SPM tip. Domains with diameters down to 30 nm are thus created with the size depending on both the switching and material parameters.

scholarly journals Highly charged 180 degree head-to-head domain walls in lead titanate

2020 ◽  
Vol 3 (1) ◽  
Author(s):  
Kalani Moore ◽  
Michele Conroy ◽  
Eoghan N. O’Connell ◽  
Charlotte Cochard ◽  
Jennifer Mackel ◽  
...  
Keyword(s):  
Domain Walls ◽  
Vacancy Concentration ◽  
Piezoresponse Force Microscopy ◽  
Ferroelectric Materials ◽  
Atomic Scale ◽  
Future Research ◽  
Strain Mapping ◽  
Transmission Electron ◽  
Scanning Transmission ◽  
Novel Material

AbstractCharged domain walls (DWs) in ferroelectric materials are an area of intense research. Microscale strain has been identified as a method of inducing arrays of twin walls to meet at right angles, forming needlepoint domains which exhibit novel material properties. Atomic scale characterisation of the features exhibiting these exciting behaviours was inaccessible with the piezoresponse force microscopy resolution of previous work. Here we use aberration corrected scanning transmission electron microscopy to observe short, stepped, highly charged DWs at the tip of the needle points in ferroelectric PbTiO3. Reverse Ti4+ shift polarisation mapping confirms the head-to-head polarisation in adjacent domains. Strain mapping reveals large deviations from the bulk and a wider DW with a high Pb2+ vacancy concentration. The extra screening charge is found to stabilise the DW perpendicular to the opposing polarisation vectors and thus constitutes the most highly charged DW possible in PbTiO3. This feature at the needle point junction is a 5 nm × 2 nm channel running through the sample and is likely to have useful conducting properties. We envisage that similar junctions can be formed in other ferroelastic materials and yield exciting phenomena for future research.

Atomic-Scale Magnetic Domain Walls in Quasi-One-Dimensional Fe Nanostripes

2001 ◽  
Vol 87 (12) ◽  
Author(s):  
M. Pratzer ◽  
H. J. Elmers ◽  
M. Bode ◽  
O. Pietzsch ◽  
A. Kubetzka ◽  
...  
Keyword(s):  
Domain Walls ◽  
Magnetic Domain ◽  
Atomic Scale ◽  
One Dimensional ◽  
Magnetic Domain Walls

scholarly journals Atomic-Scale Characterization of Ferro-Electric Domains in Lithium Niobate-revealing the Electronic Properties of Domain Walls

2019 ◽  
Vol 25 (S2) ◽  
pp. 576-577 ◽  
Author(s):  
M Conroy ◽  
K Moore ◽  
EN O'Connell ◽  
JPV McConville ◽  
H Lu ◽  
...  
Keyword(s):  
Lithium Niobate ◽  
Electronic Properties ◽  
Domain Walls ◽  
Atomic Scale ◽  
Scale Characterization

Mineral physics: the atomic, mesoscopic and macroscopic perspective

2002 ◽  
Vol 66 (5) ◽  
pp. 733-744
Author(s):  
E. K. H. Salje ◽  
S. Ríos
Keyword(s):  
Transport Properties ◽  
Crystalline Structure ◽  
Crystalline Phase ◽  
Domain Walls ◽  
Atomic Scale ◽  
Mineral Physics ◽  
Metamict Zircon ◽  
Leaching Behaviour

AbstractThe macroscopic behaviour of minerals is not always directly related to their crystalline structure at the atomic scale but often depends explicitly on mesoscopic (nanometer–micrometer) features. This paper reviews various cases where the macroscopic phenomena differ from those of the bulk, with structural and chemical variations related to: domain walls, leading to enhanced or reduced transport properties; surfaces controlling growth morphologies; and radiation-damaged minerals where the interface between the amorphous and crystalline phase is believed to play a key role in hydrothermal leaching behaviour. Minerals explicitly discussed are: quartz, agate, hydroxylapatite, cordierite and metamict zircon.

scholarly journals Charged domain boundaries stabilized by translational symmetry breaking in the hybrid improper ferroelectric Ca3–xSrxTi2O7

2021 ◽  
Vol 2 (1) ◽  
Author(s):  
Hiroshi Nakajima ◽  
Kosuke Kurushima ◽  
Shinya Mine ◽  
Hirofumi Tsukasaki ◽  
Masaya Matsuoka ◽  
...  
Keyword(s):  
Density Functional ◽  
Domain Walls ◽  
Density Functional Theory Calculations ◽  
Ferroelectric Materials ◽  
Atomic Scale ◽  
Boundary Structure ◽  
Structural Defects ◽  
Functional Theory ◽  
Domain Boundaries ◽  
Resolution Imaging

AbstractCharged domain walls and boundaries in ferroelectric materials display distinct phenomena, such as an increased conductivity due to the accumulation of bound charges. Here, we report the electron microscopy observations of atomic-scale arrangements at charged domain boundaries in the hybrid improper ferroelectric Ca2.46Sr0.54Ti2O7. Like in the prototype improper ferroelectric YMnO3, we find that charged domain boundaries in Ca2.46Sr0.54Ti2O7 correspond to out-of-phase boundaries, which separate adjacent domains with a fractional translational shift of the unit cell. In addition, our results show that strontium ions are located at charged domain boundaries. The out-of-phase boundary structure may decrease the polarization charge at the boundary because of the ferrielectric nature of Ca2.46Sr0.54Ti2O7, thereby promoting the stabilization of the charged state. By combining atomic-resolution imaging and density-functional theory calculations, this study proposes an unexplored stabilization mechanism of charged domain boundaries and structural defects accompanying out-of-phase translational shifts.

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