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Andrew Balk

Andrew Balk is a CNST/UMD Postdoctoral Researcher in the Nanofabrication Research Group. He received a B.S. and a Ph.D. in Physics from Penn State. His graduate research used low-temperature Hall effect measurements to probe the nanoscale flexing motion of magnetic domain walls. Andy joined the CNST in 2012 to work with John Unguris developing new measurement methods based on Scanning Electron Microscopy with Polarization Analysis (SEMPA) to elucidate the magnetic properties of nanoscale patterned thin films and magneto-electronic devices. He is currently working with Samuel M. Stavis and John Unguris to develop new methods combining nanofabricated devices and superresolution optical microscopy for characterizing magnetic nanoparticles.


Selected Publications:
  • Magnetometry of single ferromagnetic nanoparticles using magneto-optical indicator films with spatial amplification, A. L. Balk, C. Hangarter, S. M. Stavis, and J. Unguris, Applied Physics Letters 106, 112402 (2015).
    NIST Publication Database    Journal Web Site

  • Critical behavior of zero-field magnetic fluctuations in perpendicularly magnetized thin films, A. L. Balk, M. D. Stiles, and J. Unguris, Physical Review B 90, 184404 (2014).
    NIST Publication Database Journal Web Site

  • Kilohertz rotation of nanorods propelled by ultrasound, traced by microvortex advection of nanoparticles, A. L. Balk, L. O. Mair, P. P. Mathai, P. N. Patrone, W. Wang, S. Ahmed, T. E. Mallouk, J. A. Liddle, and S. M. Stavis, ACS Nano 8, 8300-8309 (2014).
    NIST Publication Database Journal Web Site

  • Measurements of nanoscale domain wall flexing in a ferromagnetic thin film, A. L. Balk, M. E. Nowakowski, M. J. Wilson, D. W. Rench, P. Schiffer, D. D. Awschalom, and N. Samarth, Physical Review Letters 107, 077205 (2011).

Staff Photo - A. Balk


CNST/UMD Postdoctoral Researcher
Nanofabrication Research Group


B.S. Physics – The Pennsylvania State University

Ph.D. Physics – The Pennsylvania State University


Phone: 301-975-8682