Dr. Graham Smith

Position:
Reader
Research Theme:
Condensed Matter and Photonics
Research Groups:
Soft Matter, Statistical Physics and Biophysics, Photonics
Institution:
St. Andrews
Email address:
gms@st-andrews.ac.uk
Website:
http://www.st-andrews.ac.uk/physics/PHP_Global/Staff_Info.php?id=49
Telephone number:
+44 (0)1334 462669
Address:
School of Physics & Astronomy, Physical Science Building, North Haugh, St Andrews, KY16 9SS, United Kingdom

Research interests

Characterising charge carriers and traps in organic semiconductors using ESR. (Electron Spin Resonance)

High Magnetic Field Electron Spin Resonance. This is an enabling technique in the study of paramagnetic systems (transition metal ions, free radicals, defects) in materials science and structural biology offering higher resolution, higher sensitivity and higher energy quanta. At St.Andrews we have used the expertise within the millimetre wave and magnetic resonance groups to construct a highly sensitive quasi-optical spectrometer that works from 80 to 300GHz in magnetic fields up to 12T at cryogenic temperatures. This spectrometer has state of the art sensitivity and is now a UK EPSRC facility and part of a European network on High Field ESR Instrumentation and research. The spectrometer has also been commercialised and several versions are now being used at leading laboratories around the world

High Field Ferromagnetic Resonance. This is the study of ferromagnetic resonance in very high magnetic fields and uses the same type of spectrometer as for high field ESR measurements. Multi-frequency measurements in high fields allow anisotropy fields and damping terms to be calculated which are important parameters in the characterisation of magnetic storage media. The extra sensitivity available with the high field spectrometer has allowed very thin films to be characterised under conditions of full saturation and is very much an enabling technique

Magnetic Resonance Force Microscopy (MRFM). This is a new technique that combines the spatial resolution of scanning probe microscopy with the chemical specifity associated with electron spin resonance. The magnetic resonance group is currently constructing a probe that works in high magnetic fields, low temperatures and in vacuum and should have a spatial resolution of around 10nm. Initial experiments have been very promising and point to the to the possibility of single spin sensitivity. If this can be achieved there are major applications in surface chemistry, ferromagnetic systems, semiconductor characterisation and structural biology.

For further information, see the High Field ESR web-site.

Research outputs

  1. Orientation selection in high-field RIDME and PELDOR experiments involving low-spin CoII ions DOI
    Angeliki Giannoulis, Claire Louise Motion, Maria Oranges, Michael Buehl, Graham Murray Smith and Bela Ernest Bode, Physical Chemistry Chemical Physics, 20, 4 , p. 2151-2154 (2018)
  2. Smoothly profiled quasi-optical output launcher for a W-band gyro-TWA DOI
    Liang Zhang, Wenlong He, Craig R. Donaldson, Adrian W. Cross, Graham M. Smith, Duncan A. Robertson and Robert I. Hunter (2017)
  3. Optimization and Measurement of a Smoothly Profiled Horn for a W-Band Gyro-TWA DOI
    Liang Zhang, Wenlong He, Craig R. Donaldson, Graham M. Smith, Duncan A. Robertson, Robert I. Hunter and Adrian W. Cross, IEEE Transactions on Electron Devices, 64, 6 , p. 2665-2669 (2017)
  4. The use of composite pulses for improving DEER signal at 94 GHz DOI
    Claire L. Motion, Scott L. Cassidy, Paul A. S. Cruickshank, Robert I. Hunter, David R. Bolton, Hassane El Mkami, Sabine Van Doorslaer, Janet E. Lovett and Graham M. Smith, Journal of Magnetic Resonance, 278, p. 122-133 (2017)
  5. An output coupler for a W-band high power wideband gyro-amplifier DOI
    Paul McElhinney, Craig Donaldson, Johannes Erik McKay, Liang Zhang, Duncan Alexander Robertson, Robert Iain Hunter, Graham Murray Smith, Wenlong He and Adrian Cross, IEEE Transactions on Electron Devices, 64, 4 (2017)
  6. Design of a spline horn for a W-band gyro-TWA DOI
    Liang Zhang, Wenlong He, Craig R. Donaldson, Adrian W. Cross, Duncan Robertson, Robert Hunter and Graham Smith, p. 154-155 (2017)
  7. High Gaussicity feedhorns for sub-/ millimeter wave applications DOI
    Duncan A. Robertson, Johannes E. McKay, Robert I. Hunter, Peter J. Speirs and Graham M. Smith (2016)
  8. Compact corrugated feedhorns with high Gaussian coupling efficiency and -60 dB sidelobes DOI
    Johannes Erik McKay, Duncan Alexander Robertson, Peter James Speirs, Robert Iain Hunter, Richard John Wylde and Graham Murray Smith, IEEE Transactions on Antennas and Propagation, 64, 6 , p. 2518-2522 (2016)
  9. DEER sensitivity between iron centers and nitroxides in heme-containing proteins improves dramatically using broadband, high-field EPR DOI
    Claire Louise Motion, Janet Eleanor Lovett, Stacey Bell, Scott Lindsay Cassidy, Paul Alexander Sawchuk Cruickshank, David Robert Bolton, Robert Iain Hunter, Hassane El Mkami, Sabine Van Doorslaer and Graham Murray Smith, Journal of Physical Chemistry Letters, 7, 8 , p. 1411-1415 (2016)
  10. Towards increased concentration sensitivity for continuous wave EPR investigations of spin-labeled biological macromolecules at high fields DOI
    Likai Song, Zhanglong Liu, Pavanjeet Kaur, Jackie M. Esquiaqui, Robert I. Hunter, Stephen Hill, Graham M. Smith and Gail E. Fanucci, Journal of Magnetic Resonance, 265, p. 188-196 (2016)
Last updated: 17 Mar 2016 at 20:48