J M Gregg
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Explore the profile of J M Gregg including associated specialties, affiliations and a list of published articles.
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64
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341
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Recent Articles
1.
Fernandez-Posada C, Cochard C, Gregg J, Whatmore R, Carpenter M
J Phys Condens Matter
. 2020 Nov;
33(9):095402.
PMID: 33202391
Domain walls in Cu-Cl boracite develop as a consequence of an improper ferroelastic, improper ferroelectric transition, and have attracted close interest because some are conductive and all can be mechanically...
2.
Chaudhary P, Lu H, Lipatov A, Ahmadi Z, McConville J, Sokolov A, et al.
Nano Lett
. 2020 Jun;
20(8):5873-5878.
PMID: 32574058
Application of conducting ferroelectric domain walls (DWs) as functional elements may facilitate development of conceptually new resistive switching devices. In a conventional approach, several orders of magnitude change in resistance...
3.
4.
Pradhan D, Mishra A, Kumari S, Basu A, Somayazulu M, Gradauskaite E, et al.
Sci Rep
. 2019 Feb;
9(1):1685.
PMID: 30737467
We have studied the atomic force microscopy (AFM), X-ray Bragg reflections, X-ray absorption spectra (XAS) of the Pd L-edge, Scanning electron microscopey (SEM) and Raman spectra, and direct magnetoelectric tensor...
5.
Campbell M, McConville J, McQuaid R, Prabhakaran D, Kumar A, Gregg J
Nat Commun
. 2016 Dec;
7:13764.
PMID: 27941794
Enhanced conductivity at specific domain walls in ferroelectrics is now an established phenomenon. Surprisingly, however, little is known about the most fundamental aspects of conduction. Carrier types, densities and mobilities...
6.
Whyte J, Gregg J
Nat Commun
. 2015 Jun;
6:7361.
PMID: 26059779
For over a decade, controlling domain-wall injection, motion and annihilation along nanowires has been the preserve of the nanomagnetics research community. Revolutionary technologies have resulted, like racetrack memory and domain-wall...
7.
Schiemer J, Carpenter M, Evans D, Gregg J, Schilling A, Arredondo M, et al.
Adv Funct Mater
. 2015 Apr;
24(20):2993-3002.
PMID: 25844085
Recently, lead iron tantalate/lead zirconium titanate (PZTFT) was demonstrated to possess large, but unreliable, magnetoelectric coupling at room temperature. Such large coupling would be desirable for device applications but reproducibility...
8.
Evans D, Schilling A, Kumar A, Sanchez D, Ortega N, Katiyar R, et al.
Philos Trans A Math Phys Eng Sci
. 2014 Jan;
372(2009):20120450.
PMID: 24421376
Thin single-crystal lamellae cut from Pb(Zr,Ti)O3-Pb(Fe,Ta)O3 ceramic samples have been integrated into simple coplanar capacitor devices. The influence of applied electric and magnetic fields on ferroelectric domain configurations has been...
9.
Ahluwalia R, Ng N, Schilling A, McQuaid R, Evans D, Gregg J, et al.
Phys Rev Lett
. 2013 Nov;
111(16):165702.
PMID: 24182281
Freestanding BaTiO3 nanodots exhibit domain structures characterized by distinct quadrants of ferroelastic 90° domains in transmission electron microscopy (TEM) observations. These differ significantly from flux-closure domain patterns in the same...
10.
Chang L, Nagarajan V, Scott J, Gregg J
Nano Lett
. 2013 May;
13(6):2553-7.
PMID: 23679003
In specific solid-state materials, under the right conditions, collections of magnetic dipoles are known to spontaneously form into a variety of rather complex geometrical patterns, exemplified by vortex and skyrmion...