Zobrazeno 1 - 10
of 24
pro vyhledávání: '"R. G. P. McQuaid"'
Publikováno v:
Domain Walls
Domain Walls-From Fundamental Properties to Nanotechnology Concepts
Dennis Meier; Jan Seidel; Marty Gregg; Ramamoorthy Ramesh. Domain Walls-From Fundamental Properties to Nanotechnology Concepts, Oxford University Press, 2020, 9780198862499. ⟨10.1093/oso/9780198862499.003.0006⟩
Domain Walls-From Fundamental Properties to Nanotechnology Concepts
Dennis Meier; Jan Seidel; Marty Gregg; Ramamoorthy Ramesh. Domain Walls-From Fundamental Properties to Nanotechnology Concepts, Oxford University Press, 2020, 9780198862499. ⟨10.1093/oso/9780198862499.003.0006⟩
This chapter focuses on the specific physical properties at domain walls in ferroelectric materials where the spontaneous electric polarization appears as a by-product of a structural or magnetic phase transition, and not as its primary order paramet
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b22b3d0b029f6bce23defee5d8b1cf23
https://opus.bibliothek.uni-augsburg.de/opus4/files/96016/96016.pdf
https://opus.bibliothek.uni-augsburg.de/opus4/files/96016/96016.pdf
Publikováno v:
Suna, A, Baxter, O E, McConville, J P V, Kumar, A, McQuaid, R G P & Gregg, J M 2022, ' Conducting ferroelectric domain walls emulating aspects of neurological behavior ', Applied Physics Letters, vol. 121, no. 22, 222902 . https://doi.org/10.1063/5.0124390
The electrical conductivity of lithium niobate thin film capacitor structures depends on the density of conducting 180[Formula: see text] domain walls, which traverse the interelectrode gap, and on their inclination angle with respect to the polariza
Autor:
Eileen Courtney, Kalani Moore, Joseph G. M. Guy, R. G. P. McQuaid, Charlotte Cochard, Ursel Bangert, Pablo Aguado-Puente, Michele Conroy, Elisabeth Soergel, Roger W. Whatmore, Amit Kumar, J. Marty Gregg, Alan Harvey
Publikováno v:
Guy, J, Cochard, C, Aguado-Puente, P, Soergel, E, Whatmore, R, Conroy, M, Moore, K, Courtney, E, Harvey, A, Bangert, U, Kumar, A, McQuaid, R & Gregg, M 2021, ' Anomalous Motion of Charged Domain Walls and Associated Negative Capacitance in Copper-Chlorine Boracite ', Advanced Materials . https://doi.org/10.1002/adma.202008068
During switching, the microstructure of a ferroelectric normally adapts to align internal dipoles with externally applied electric fields. Dipolar regions (domains), that are favourably oriented, grow at the expense of those in unfavourable orientati
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ccf9a938d36171b472e7d4823e604c8d
https://pure.qub.ac.uk/en/publications/e4918ba3-3aca-4d49-973f-954bdba0c122
https://pure.qub.ac.uk/en/publications/e4918ba3-3aca-4d49-973f-954bdba0c122
Autor:
Michael A. Carpenter, Roger W. Whatmore, R. G. P. McQuaid, C. Cochard, Torsten Granzow, Carmen M. Fernández-Posada, Joseph G. M. Guy, J. M. Gregg
Publikováno v:
Cochard, C, Gransow, T, Fernández-Posada, C M, Carpenter, M A, McQuaid, R G P, Guy, J G M, Whatmore, R W & Gregg, J M 2021, ' Influence of charged walls and defects on DC resistivity and dielectric relaxations in Cu-Cl boracite ', Applied Physics Letters, vol. 119, no. 29, 202904 . https://doi.org/10.1063/5.0067846
Charged domain walls form spontaneously in Cu-Cl boracite on cooling through the phase transition. These walls exhibit changed conductivity compared to the bulk and motion consistent with the existence of negative capacitance. Here, we present the di
Autor:
R. G. P. McQuaid, Frederik Kuschewski, Denny Lang, Susanne C. Kehr, Thomas Kampfe, J. Marty Gregg, Lisa Ortmann, Lukas M. Eng, Jonathan Döring
Publikováno v:
Kehr, S C, McQuaid, R G, Ortmann, L, Kampfe, T, Kuschewski, F, Lang, D, Doring, J, Gregg, J M & Eng, L M 2016, ' A Local Superlens ', ACS Photonics, vol. 3, no. 1, pp. 20-26 . https://doi.org/10.1021/acsphotonics.5b00365
Superlenses enable near-field imaging beyond the optical diffraction limit. However, their widespread implementation in optical imaging technology so far has been limited by large-scale fabrication, fixed lens position, and specific object materials.
Autor:
Michael Campbell, Jakob Schaab, Patrick W. Turner, James P. V. McConville, Shane J. McCartan, Amit Kumar, R. G. P. McQuaid, J. Marty Gregg
Publikováno v:
Turner, P W, McConville, J P V, McCartan, S J, Campbell, M H, Schaab, J, McQuaid, R G P, Kumar, A & Gregg, J M 2018, ' Large Carrier Mobilities in ErMnO3 Conducting Domain Walls Revealed by Quantitative Hall Effect Measurements ', Nano Letters, vol. 18, no. 10, pp. 6381-6386 . https://doi.org/10.1021/acs.nanolett.8b02742
Kelvin Probe Force Microscopy (KPFM) has been used to directly and quantitatively measure Hall voltages, developed at conducting tail-to-tail domain walls in ErMnO3 single crystals, when current is driven in the presence of an approximately perpendic
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::255b67d31b29a3fd6137a625df964e9e
https://pure.qub.ac.uk/en/publications/b5c84624-5dab-43ac-88ce-301047d500af
https://pure.qub.ac.uk/en/publications/b5c84624-5dab-43ac-88ce-301047d500af
Autor:
Clive Downing, Michele Conroy, Eileen Courtney, Charlotte Cochard, Lewys Jones, R. G. P. McQuaid, Joseph G. M. Guy, Alan Harvey, Roger W. Whatmore, Marty Gregg, Kalani Moore, Eoghan O'Connell, Ursel Bangert
Publikováno v:
Microscopy and Microanalysis. 25:1882-1883
Autor:
R. G. P. McQuaid, Alexei Gruverman, J. Marty Gregg, J. R. Whyte, Carlota Canalias, James F. Scott, Pankaj Sharma
Publikováno v:
Whyte, J, McQuaid, R, Sharma, P, Canalias, C, Scott, J, Gruverman, A & Gregg, M 2014, ' Ferroelectric Domain Wall Injection ', Advanced Materials, vol. 26, no. 2, pp. 293 . https://doi.org/10.1002/adma.201303567
Ferroelectric domain wall injection has been demonstrated by engineering of thelocal electric field, using focused ion beam milled defects in thin single crystal lamellae of KTiOPO4 (KTP). The electric field distribution (top) displays localized fiel
Publikováno v:
Sharma, P, McQuaid, R, McGilly, L J, Gregg, J M & Gruverman, A 2013, ' Nanoscale Dynamics of Superdomain Boundaries in Single-Crystal BaTiO3 Lamellae ', Advanced Materials, vol. 25, no. 9, pp. 1323-1330 . https://doi.org/10.1002/adma.201203226
Publikováno v:
Schilling, A, Kumar, A, McQuaid, R G P, Glazer, A M, Thomas, P A & Gregg, J M 2016, ' Reconsidering the Origins of Forsbergh Birefringence Patterns ', Physical Review B (Condensed Matter), vol. 94, no. 2, 024109 . https://doi.org/10.1103/PhysRevB.94.024109
In 1949, Forsbergh, Jr. reported spontaneous spatial ordering in the birefringence patterns seen in flux-grown $\mathrm{BaTi}{\mathrm{O}}_{3}$ crystals under the transmission polarized light microscope [Phys. Rev. 76, 1187 (1949)]. Stunningly regular
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::eae39830221de5a297eed57828c6db23
https://pure.qub.ac.uk/en/publications/746207e1-e678-4859-b0b5-3d8d782559a0
https://pure.qub.ac.uk/en/publications/746207e1-e678-4859-b0b5-3d8d782559a0