• Room 01.014 - New Physics

    United Kingdom

Accepting PhD Students

20012020

Research output per year

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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

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 journalArticle

Open Access
File
  • 7 Downloads (Pure)

    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 journalArticle

    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 journalArticle

    Open Access
    File
  • 28 Downloads (Pure)

    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 journalArticle

  • 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 journalArticle

  • 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

  • Royal Irish Academy

    Gregg, Marty (Recipient), 16 Mar 2018

    Prize: Election to learned society

    Activities

    Invited Talk at IoP Dielectrics 2019

    Marty Gregg (Invited speaker)

    12 Apr 2019

    Activity: Talk or presentation typesInvited talk

    Invited Talk at the Materials Research Society Fall 2019 Meeting

    Marty Gregg (Invited speaker)

    06 Dec 2019

    Activity: Talk or presentation typesInvited talk

    Departmental Seminar at London Centre for Nanotechnology (UCL)

    Marty Gregg (Invited speaker)

    15 Jan 2019

    Activity: Talk or presentation typesInvited talk

    Invited Talk at EMA2019

    Marty Gregg (Invited speaker)

    25 Jan 2019

    Activity: Talk or presentation typesInvited talk

    Invited Talk at EMRS 2019

    Marty Gregg (Invited speaker)

    30 May 2019

    Activity: Talk or presentation typesInvited talk

    Press / Media

    Behind the Science

    Marty Gregg

    20/02/2017

    1 Media contribution

    Press/Media: Public Engagement Activities

    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 2020

    Supervisor: Gregg, J. (Supervisor) & Kumar, A. (Supervisor)

    Student thesis: Doctoral ThesisDoctor of Philosophy

    File

    Domain Patterns and Domain Wall Dynamics in Small-Scale Ferroelectrics

    Author: McQuaid, R. G., Dec 2012

    Supervisor: Gregg, J. (Supervisor)

    Student thesis: Doctoral ThesisDoctor of Philosophy

    File

    Hall Potential Mapping of Conducting Ferroelectric Domain Walls

    Author: Campbell, M., Sep 2017

    Supervisor: Gregg, J. (Supervisor) & Kumar, A. (Supervisor)

    Student thesis: Doctoral ThesisDoctor of Philosophy

    File

    Microstructural Dynamics Induced by Nanoscale Stress in Ferroelectrics

    Author: Edwards, D., May 2018

    Supervisor: Gregg, J. (Supervisor) & Kumar, A. (Supervisor)

    Student thesis: Doctoral ThesisDoctor of Philosophy

    Nanoscale Stress-Induced Conducting States in Functional Oxides

    Author: Browne, N., Jul 2018

    Supervisor: Kumar, A. (Supervisor) & Gregg, J. (Supervisor)

    Student thesis: Doctoral ThesisDoctor of Philosophy