Research

I'm currently a fifth year physics Ph.D student doing experimental condensed matter physics research in Dan Ralph's group at Cornell. My subfield is spintronics, which has the aim of better utilizing electron spin in various forms for computation and data storage. To do this effectively, we need to be able to create currents of spin, that is a flow of electrons with a coherent spin direction. This is still an active area of research, and my work generally involves looking at new materials which may be able to generate spin currents efficiently and seeing how good they actually are at doing that.

For any experts, in particular I am working on measuring spin currents produced by ferromagnets in the hope that the broken symmetry offered by the magnetization can be useful in generating spin currents with more flexible polarization.

I'm also involved in generally making our techniques for measuring charge-spin conversion more accuarate, as well as at least somewhat involved in our group's efforts to investigate 2D van der Waals magnetic materials.

Publications & Presentations

Publications

Resonant Measurement of Nonreorientable Spin-Orbit Torque from a Ferromagnetic Source Layer Accounting for Dynamic Spin Pumping - JA Mittelstaedt, DC Ralph - Phys. Rev. Applied 16, 024035 (2021)

Novel Spin–Orbit Torque Generation at Room Temperature in an All-Oxide Epitaxial La0.7Sr0.3MnO3/SrIrO3 System - X Huang, S Sayed, JA Mittelstaedt et. al. - Adv. Mater. 2021, 33, 2008269 (2021)

Manipulation of the van der Waals Magnet Cr2Ge2Te6 by Spin–Orbit Torques - V Gupta, TM Cham, GM Stiehl, A Bose, JA Mittelstaedt, K Kang, S Jiang, KF Mak, J Shan, RA Buhrman, DC Ralph - Nano Lett. 2020, 20, 10, 7482–7488

Transverse and longitudinal spin-torque ferromagnetic resonance for improved measurement of spin-orbit torque - S Karimeddiny, JA Mittelstaedt, RA Buhrman, DC Ralph - Physical Review Applied 14 (2), 024024 (2020)

Presentations

Magnetization-Independent Spin Hall Effect in Ferromagnetic Trilayers - Presentation given at the 2021 March Meeting of the American Physical Society. March 12, 2021

STELLTRANS: A Transport Analysis Suite for Stellarators - Poster presented at the 58th annual meeting of the American Physical Society Division of Plasma Physics. November 1, 2016

Code

I love playing around with Python and have been using it as well as the general scientific and numerical python ecosystem for several years in the course of research. Over this time, I've begun to make and contribute to some code which may actually be of use to people. If you're interested, I'd suggest that you check out my github profile which has a decent selection of the notable things I've done. Also, for what it's worth, I wrote all the HTML and CSS for this webpage myself!