1. Department of Physics and Astronomy, Purdue University, West Lafayette, Indiana 47907, USA
2. Department of Physics, University of Notre Dame, Notre Dame, Indiana 46556, USA
3. Notre Dame Integrated Imaging Facility, University of Notre Dame, Notre Dame, Indiana 46556, USA
4. Neutron Scattering Division, Neutron Sciences Directorate, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
5. Birck Nanotechnology Center, Purdue University, West Lafayette, Indiana 47907, USA
6. Department of Electrical and Computer Engineering, Purdue University, West Lafayette, Indiana 47907, USA