Nanoscale spatiotemporal magnetic microscopy with scanning plasmonic probes
Abstract
This DURIP proposal is a $94,000 request for the equipment to create a stand-alone spatiotemporal magneto-thermal microscope based on scanning-probe plasmonic antennas. This instrument is an evolution of the existing focused-light magneto-thermal microscope with the following desirable characteristics: (1) it measures in-plane magnetization with high sensitivity (<0.1°/?), (2) it has excellent temporal resolution (~ 10 ps), (3) it can image static and dynamic magnetization in either magnetic metals or magnetic insulators. Because it uses focused light to create a thermal excitation, the spatial resolution of the existing magneto-thermal microscope is limited to ~600 nm. However, thermal sources are not fundamentally diffraction limited like optical sources are. By integrating a scanning plasmonic tip as a nanoscale thermal source, a nanoscale version of the magneto-thermal microscope will have an estimated 50 nm spatial resolution and 10 ps temporal resolution. This capability will be unique in a table-top, labaccessible format, and it will be competitive with facility-based x-ray magnetic microscopes that are less accessible and more expensive. Recent theoretical and proof-of-concept experimental work supports that this approach is both feasible and within close reach. For these reasons, this DURIP request, which will enable the construction of a stand-alone scanning probe magneto-thermal microscope, will accelerate research into high-performance and nonvolatile magneto-electronic technologies in support of Department of Defense missions.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Jul 11, 2018
- Source ID
- FA95501810408
Entities
People
- Gregory D Fuchs
Organizations
- Air Force Office of Scientific Research
- Cornell University
- United States Air Force