Projects per year
Personal profile
Research Interests
Marty Gregg leads the nanoscale ferroelectric activity in Queen's University Belfast. He has had research activities on ferroelectric thin films and superlattices grown by Pulsed Laser Deposition (PLD) in the past, but more recently his research has involved the characterisation and understanding of well-controlled nanoscale ferroelectric entities cut from high purity bulk crystals using Focused Ion Beam milling. He has been directing particular attention to understanding and controlling domain and domain wall properties. This is rapidly becoming an area of great excitement, as it is becoming clear that ferroelectric domain walls are functional materials in their own right, with properties different from the domains that they surround.
Microscopy is a critical component in nanoscale ferroelectric research and Marty has been heavily involved in electron, ion and scanning probe techniques for most of his career. He has rejuvenated the transmission electron microscopy (TEM) and focused ion beam (FIB) microscopy capability of the university twice: first in 2000 through £1.5M of EPSRC funding for a Tecnai F20 TEM and FEI FIB and again in 2017 through £1.8M of EPSRC funding for a FEI Talos TEM and two Tescan FIBs. He is Director of the Electron Microscopy Facility.
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Projects
R6433CMM: Electric field driven magnetization switching in multiferroic nanoislands
25/02/2014 → …
Project: Research
Research Output
Ferroelectric Domain Wall Memristor
McConville, J. P. V., Lu, H., Wang, B., Tan, Y., Cochard, C., Conroy, M., Harvey, A., Bangert, U., Chen, L-Q., Gruverman, A. & Gregg, J. M., 13 May 2020, In : Advanced Functional Materials. 8 p., 2000109.Research output: Contribution to journal › Article
Open Access
File
Lead palladium zirconate titanate: A room temperature nanoscale multiferroic thin film
Mishra, K., Hernandez, J., Instan, A., McCartan, S., Gregg, M. & Katiyar, R. S., 13 May 2020, (Accepted) In : Journal of Applied Physics.Research output: Contribution to journal › Article
Open Access
File
Nanodomain Patterns in Ultra-Tetragonal Lead Titanate (PbTiO3)
Kumar, A., Guy, J., Zhang, L., Chen, J., Gregg, M. & Scott, J., 05 May 2020, In : Applied Physics Letters. 116, 182903.Research output: Contribution to journal › Article
Open Access
File
Observation of Unconventional Dynamics of Domain Walls in Uniaxial Ferroelectric Lead Germanate
Baek, O., Holstad, T. S., Tan, Y., Lu, H., Evans, D., Hunnestad, K. A., Wang, B., McConville, J., Becker, P., Bohaty, L., Lukyanchuk, I., Vinokur, V. M., van Helvoort, A. T. J., Gregg, M., Chen, L-Q., Meier, D. & Gruverman, A., 18 Mar 2020, In : Advanced Functional Materials.Research output: Contribution to journal › Article
An Electronically-Driven Improper Ferroelectric: Tungsten Bronzes as Microstructural Analogues for the Hexagonal Manganites
McNulty, J., Tran, T., Halasyamani, S., McCartan, S., MacLaren, I., Gibbs, A., Lim, F., Turner, P., Gregg, J., Lightfoot, P. & Morrison, F., 04 Oct 2019, In : Advanced Materials. 31, 40, 1903620.Research output: Contribution to journal › Article
1
Citation
(Scopus)
Prizes
Elected Member of the Royal Irish Academy
Gregg, Marty (Recipient), 16 Mar 2018
Prize: Election to learned society
Fellow of the Institute of Physics
Gregg, Marty (Recipient), 2007
Prize: Fellowship awarded competitively
International Award of Ferroelectric Materials and Their Applications (formerly the Ikeda Prize)
Gregg, Marty (Recipient), 23 May 2012
Prize: Prize (including medals and awards)
Activities
Invited Talk at IoP Dielectrics 2019
Marty Gregg (Invited speaker)
12 Apr 2019
Activity: Talk or presentation types › Invited talk
Invited Talk at the Materials Research Society Fall 2019 Meeting
Marty Gregg (Invited speaker)
06 Dec 2019
Activity: Talk or presentation types › Invited talk
Departmental Seminar at London Centre for Nanotechnology (UCL)
Marty Gregg (Invited speaker)
15 Jan 2019
Activity: Talk or presentation types › Invited talk
Invited Talk at EMA2019
Marty Gregg (Invited speaker)
25 Jan 2019
Activity: Talk or presentation types › Invited talk
Invited Talk at EMRS 2019
Marty Gregg (Invited speaker)
30 May 2019
Activity: Talk or presentation types › Invited talk
Press / Media
Impact
Failure in Multilayer Ceramic Capacitors (MLCCs) for AVX Ltd
Robert Bowman (Participant), Marty Gregg (Participant), Mohamed Saad (Participant), Li-Wu Chang (Participant), Mark McMillen (Participant) & Alina Schilling (Participant)
Impact: Economic Impact
Seagate Technology R&D Investment Strategy
Alina Schilling (Participant), Robert Bowman (Participant), Marty Gregg (Participant), Paul Evans (Participant), Xinhua Zhu (Participant), John McPhillips (Participant), Robert Pollard (Participant), Ronald Atkinson (Participant), William Hendren (Participant), Gregory Wurtz (Participant), Wayne Dickson (Participant) & Anatoly Zayats (Participant)
Impact: Economic Impact
Thesis
An investigation into six-fold domain wall vertices in improper ferroelectrics, and their potential as one dimensional pn-junctions
Author: Turner, P., Jul 2020Supervisor: Gregg, J. (Supervisor) & Kumar, A. (Supervisor)
Student thesis: Doctoral Thesis › Doctor of Philosophy
File
Domain Patterns and Domain Wall Dynamics in Small-Scale Ferroelectrics
Author: McQuaid, R. G., Dec 2012Supervisor: Gregg, J. (Supervisor)
Student thesis: Doctoral Thesis › Doctor of Philosophy
File
Hall Potential Mapping of Conducting Ferroelectric Domain Walls
Author: Campbell, M., Sep 2017Supervisor: Gregg, J. (Supervisor) & Kumar, A. (Supervisor)
Student thesis: Doctoral Thesis › Doctor of Philosophy
File
Microstructural Dynamics Induced by Nanoscale Stress in Ferroelectrics
Author: Edwards, D., May 2018Supervisor: Gregg, J. (Supervisor) & Kumar, A. (Supervisor)
Student thesis: Doctoral Thesis › Doctor of Philosophy
Nanoscale Stress-Induced Conducting States in Functional Oxides
Author: Browne, N., Jul 2018Supervisor: Kumar, A. (Supervisor) & Gregg, J. (Supervisor)
Student thesis: Doctoral Thesis › Doctor of Philosophy