PROFESSOR EDWIN FOHTUNG RECEIVES A THREE-YEAR $396K DOD-AFOSR GRANT.
Edwin Fohtung, LANSCE Assistant Professor at New Mexico State University and faculty at the Department of Physics received a new grant from the Department of Defense (DOD), Airforce Office of Scientific Research (AFOSR). The three-year $396 K grant funded by the DOD-AFOSR is entitled “Nanoscale Probing of Magneto-electric Phases.”
This project deals with the application of nanoscale topological defect engineering concepts and in-operando 3D coherent X-ray scattering and imaging techniques, pioneered by Professor Fohtung, to the development of the next generation of magnetoelectric devices that enable advanced electro/magneto-optic detection, storage, sensing, and imaging.
Professor Edwin Fohtung named 2015 Rosen Scholar at Los Alamos National Laboratory
Dr. Edwin Fohtung is the 2015 Rosen Scholar at the Los Alamos Neutron Science Center (LANSCE) at TA-53. The Rosen Scholar is a fellowship created to honor the memory of renowned LANL physicist Louis Rosen – his accomplishment, work, and appreciation for the broad range of science performed at LANSCE.
A new way to enhance the capacity of memory devices
Our group captured the 3D morphology of complex textures of electric field polarization that forms a vortex core within individual ferroelectric Barium Titanate (BTO) nanoparticles.
Under device, relevant conditions of an external electrical field, and three-dimensional spatial resolution from BCDI, our team showed that the vortex core is actually a 1D -paraelectric vortex nanorod of about 30 nanometers in width—a billion times smaller than a human hair.
“One of the important features of such ferroelectric vortex rod is that it is closed under the mathematical group operation satisfied by topological defects. Such a topological vortex which looks like a discernible twisting is caused by a small displacement of BTO atoms and strong coupling with phonon modes. The vortex core is a nanostrand which can be both displaced, erased and restored again by an external electric field within individual nanoparticles.
This discovery can provide scientists with new methods for designing next-generation quantum computing components. For example, nanoparticles with such vortex-phases may increase computer RAM storage capacity by 10,000-fold. Prof. Fohtung and his team’s work is supported by the Los Alamos National Laboratory. The team used X-rays from the Advanced Photon Source at Argonne National Laboratory in Lemont, Illinois, and the Bragg X-ray Coherent Diffractive Imaging (BCDI) technique to probe a single particle of BTO, with 18 nanometers resolution in 3D.