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Indiana University Bloomington

Jason S. Gardner

Jason S. Gardner Research Scientist
Condensed Matter Physics (Experimental)

B.Sc., University of Warwick, 1991
M.Sc., Keele University, 1992
Ph.D., University of Warwick, 1996
Post-docs at McMaster and Los Alamos

Office: NIST
Phone: (301) 975-8391
Email: gardnerj at indiana.edu

Curriculum Vitae
Group Webpage


Research Summary
My research is in neutron scattering on magnetic model systems like spin liquids, spin ice and low dimensional systems. With these materials interests in mind I usually perform neutron experiment on cold source spectrometers to study the spin-spin correlations (both static and dynamic) within the sample at a fraction of a degree above absolute zero.

Biography
I got my physics undergraduate degree at Warwick University (1988-91) and returned in 1992 to start my Ph.D. after gaining a Masters at Keele University. During this period I worked in magnets closely related to high temperature superconductors but towards the end of my degree I developed an interest in "model magnets" - materials carefully designed to imitate statistical mechanical models. In 1996 I moved to North America and have worked in Canada or America ever since. I was a staff scientist at the Chalk River Laboratory, Canada for 5 years before moving to the National Institute of Standards and Technology, where Iím based today. In 1999 I had two papers published in Physical Review Letters. These can be regarded and my first significant scientific papers. The work on the spin liquid Tb2Ti2O7 is still discussed actively today. I work closely with Profs. Bruce Gaulin (McMaster), Steve Bramwell (London) and Chris Wiebe (Winnipeg) through whom I have developed a program of materials synthesis, bulk characterization and eventually facilities research


Selected Publications

  • Magnetic Pyrochlore Oxides

    J S Gardner, M J P Gingras and J E Greedan
    Rev. Mod. Phys, 82 53 (2010).
  • Two Dimensional Kagome Correlations and Field Induced Order in the Ferromagnetic XY Pyrochlore Yb2Ti2O7
    K A Ross, J P C Ruff, C P Adams, J S Gardner, H A Dabkowska, Y Qiu, J R D Copley, and B D Gaulin
    Phys. Rev. Lett. 103, 227202 (2009).
  • Direct observation of a nuclear spin excitation in Ho2Ti2O7
    G Ehlers, E Mamontov, M Zamponi, K C Kam and J S Gardner
    Phys. Rev. Lett. 102, 016405 (2009).
  • Spin dynamics in Ho2Ru2O7
    J S Gardner, A L Cornelius, L J Chang, M Prager, Th BrŁckel and G Ehlers
    J. Phys.: Condens Matter 17, 7089 (2005).
  • Spin-spin correlations in Yb2Ti2O7: A polarized neutron scattering study
    J S Gardner, G Ehlers, N Rosov, R W Erwin and C Petrovic
    Phys. Rev. B. 70, 180404(R) (2004).
  • Phase Transitions, Partial disorder and multi-k structures in Gd2Ti2O7
    J R Stewart, G Ehlers, A S Wills, S T Bramwell and J S Gardner
    J. Phys.: Condens. Matter 16 , L321 (2004).
  • Co-operative Paramagnetism in the Geometrically Frustrated Pyrochlore, Tb2Ti2O7
    J S Gardner, S Dunsiger, B D Gaulin, R Kiefl, M D Lumsden, Z Tun, NP Raju, I Swainson and J E Greedan
    Phys. Rev. Lett., 82, 1012 (1999).


  • Iíve published over 120 papers in the past 15 years with an h-index of 25. Iíve also given over 65 talks, many at international conferences.

  • Executive board member of the Journal of Physics: Condensed Matter http://iopscience.iop.org/0953-8984
  • In 2011, I co-directed the first frustrated magnetism meeting at the International Institute of Physics, Natal. http://www.ens-lyon.fr/FM_Brazil/spin-ice/Home.html
  • In 2010, I co-organized and participated in the fifth international conference Highly Frustrated Magnetism. http://physics-astronomy.jhu.edu/hfm2010
  • In 2008 named a Fellow of the Institute of Physics (UK) http://www.iop.org/