Accepted invted talk at German Physical Society, March 2018
Giving a talk at Colorado State University at Fort Collins, Sept. 25, 2017
Gave an invited talk at International Conference on Neutron Scattering in Seoul, Korea, July 9, 2017
Gave a talk at HRL Laboratory on Skyrmions and Magneto-Ionic Technologies May 17, 2017
Accepted an invited colloquium talk at EPFL Material Science Department, Mar. 3, 2017
Accepted invited talk at the International Conference on Neutron Scattering, in Korea, July 9, 2017
Accepted an invited colloquium talk at Virginia Tech.Physics Department, Feb. 17, 2017
Accepted an invited colloquium talk at Boston College Physics Department, Feb. 8, 2017
Accepted an invited talk at APS March Meeting 2016
Published "Concurrent magnetic and structural reconstructions at the interface of (111)-oriented La0.7Sr0.3MnO3/LaFeO3" In Physical Review B (Rapid Communications) 94, 201115 (2016)
Published "Magnetization Reversal of Nickel Three-Dimensional Anti-sphere Arrays" in Magnetics Letters
Presented a Keynote talk at the 2016 FORC Workshop in New Orleans
Published "Magnetic Yoking and Tunable Interactions in FePt-Based Hard/Soft Bilayers" in Scientific Reports, 6, 32842 (2016)
Published "Structural and Magnetic Depth Profiles of Magneto-Ionic Heterostructures beyond the Interface Limit" in Nature Communications 7, 12264 (2016)
Accepted Invited Symposium talk at the Magnetism and Magnetic Materials 2016 Conference
Accepted invited talk at the Brazilian Physics Society 50th Anniversary Meeting
Accepted invited talk at the 2nd Annual FORC Wrokshop (FORCw)
Accepted invited talk at the ALS Users Meeting
Published "Controllable positive exchange bias via redox-driven oxygen migration" in Nature Communications
Accepted invited talk at the "International Conference of Asian Union of Magnetics Societies"
Accepted invited talk at the "International workshop on Spintronics memory and logic" at Beihang University, Beijing
Accepted an invited talk at the International Conference of the Asian Union of Magnetics Societies
02/24/16 Our recent work on redox-driven magneto-ionic control of magnetism in LSMO was published today in APL!
02/11/16 Applied Physics Letters accepted our work titled "Reversible Control of Magnetism in La_0.67 Sr_0.33 Mn O_3 through Chemically-Induced Oxygen Migration", co-authored with Dr. Alexander Grutter
Accepted invited talk at "American Conference on Neutron Scattering"
Accepted invited talk at "International Conference on Polarized Neutrons for Condensed Matter Investigations"
Dustin A. Gilbert
Controlling atomic distributions within ionic materials offers the opportunity to tune virtually every property of a material, including magnetic, electronic, thermal, optical, and mechanical properties. Furthermore, the charge on the ions makes them susceptable to electric fields, opening the opportunity to control materials with ultra-low power, voltage-only approaches.
We have demonstrated control of ionic distributions by constructing heterostructures with built-in chemical potential gradient, or through active control using electric fields. Through this control, we induce metal-insulator, magnetic, and even structural transitions.
NIST Center for Neutron Research
National Institute of Standards and Technology
100 Bureau Dr. MS 6100
Gaithersburg, MD 20899
dagilbert1031 ~at~ gmail.com
Top 3 "Nanotechnology Young Researchers Award 2016" by IOP Publishing
"Growth-Induced In-Plane Uniaxial Anisotropy V2O3/Ni films revealed by FORC measurements" In Press, Arxiv
"First-order reversal curve of the magnetostructural phase transition in FeTe" Physical Review B, 95, 214402 (2017)
Other Notable Publications:
"Structural and magnetic depth profiles of magneto-ionic heterostructures beyond the interface limit" Nature Comm. 7, 12264 (2016), NIST Press Release
"Controllable positive exchange bias via redox-driven oxygen migration" Nature Comm. 7, 11050 (2016)
"Realization of ground-state artificial skyrmion lattices at room temperature" Nature Comm. 6 8462 (2015) NIST Press Release
"Tuning magnetic anisotropy in (001) oriented L10 (Fe1−xCux)55Pt45 films" Appl. Phys. Lett. 102, 132406 (2013)
APL Research Highlight, Top Stories, 11th most accessed APL 2013
"Quantitative Decoding of Interactions in Tunable Nanomagnet Arrays Using First Order Reversal Curves" Sci. Rep. 4, 4204 (2014)
Web of Science "Highly Cited Paper" (top 1% for Physics for time and field)
Using the above tools and techniques I conduct research on magnetic systems and magnetic materials. Some fields of current interest include magnetic skyrmions, magneto-ionics, and magnetic behavior at interfaces and surfaces. Magnetic skyrmions are topologically protected chiral magnetic structures with interest both to fundamental science and high-density storage and logic devices; magneto-ionics are a class of technologies similar to memristors in which an electric field is used to move ions, and in doing so, control the magnetic ordering; magnetic and electronic properties at surfaces and interfaces can be very different from the bulk properties, as demonstrated by topological insulators, and by probing the properties of these low-dimensional features we expand our understanding of physics and can develop new technologies.
Polarized Neutron Scattering
Utilizing spin polarized neutrons I investigate the magnetic and structural scattering of nanostructured systems. Neutrons are an extremely powerful characterization tool because they are penetrating - giving information about inside materials - and also are intrinsically nano-scale. Neutron scattering is sensitive to magnetic structures and have non-trivial element specific nuclear scattering which gives it a sensitivity to some elements which are otherwise hard to characterize (like oxygen). Sir. Patrick Stewart discusses neutron scattering in the below video.
Nanostructured Magnetic Systems
Conducting experimental research on nanostructured systems including psudo 1-D uniform and multi-layer nanowires, 2-D thin films and patterned arrays, and 3-D dispersed systems; I have investigated exotic domain states (vortex), high anisotropy materials, reversal in abnormal geometric shapes, multi-layer nanowires, ferromagnetic and superparamagnetic nanoparticles, and electrical transport and GMR. I also perform simulations and modeling of magnetic systems
Magnetic skyrmions are wrapped spin textures in which the moments form closed, continuous structures. These structures cannot be continuously created or destroyed, giving them non-trivial topological character. Skyrmions have the additional properties that they are frequently very small (<70 nm), and can be driven by relatively small charge currents, making them attractive for next generation magnetic recording and logic technologies.
The challenge in realizing skyrmion technologies has been stabilizing the spin structure at ambient conditions. We have overcome this challenge through nanopattering vortex-state nanodots and imprinting the chiral structure from the dot into a magnetic underlayer.
Expanding on our understanding of the first order reversal curve (FORC) technique - developed from my investigations of magnetic systems - I have investigated hysteretic transitions in other systems, searching for interactions and variations in the intrensic properties.
Surfaces and Interfaces
Two materials grown adjacent to one-another can give rise to trivial interactions which influences the their mutual behavior, but can also give rise to emergent new physics, independent of either layer by itself. This has been previously used to achieve interesting magnetic behavior such as exchange bias, but also can induce magnetism in the adjacent material, such as topological insulators. To probe the weak magnetism at the surfaces and buried interfaces I use polarized neutron reflectometry and XAS