Matthew Stolt

 

Graduate Student, Materials Chemistry
Department of Chemistry
University of Wisconsin-Madison

mstolt@chem.wisc.edu

Biographical Sketch

B.S.    Oregon State University, Chemistry, 2013

Ph.D   University of Wisconsin, Materials Chemistry, 2013-Present

 

Research

I am currently looking into magnetic nanowires that exhibit the exotic magnetic domains known as skyrmions. Skyrmions are non-collinear spin vortices that form in magnetic crystalline structures that lack inversion symmetry such as the cubic B20 structured compounds (E.g. MnSi, FeGe, MnGe, etc.). The skyrmions themselves have been shown to move through a spin torque transfer process using current densities orders of magnitudes lower than traditional ferromagnetic domains. Motion of the skyrmions pertains well to using the exotic domains as bits in Stuart Parkin's recently proposed racetrack memory skematic for high density information storage. Previously, nanowires have been shown both theoretically by the physics community and experimentally by our group to stabilize the skyrmions larger temperature and applied field windows. My research pertains to the synthesis of novel B20 structured nanowires such as FeGe and Mn1-xFexSi. Following the successful synthesis of the nanowires, I explore both the skyrmion's phase diagram and the electrodynamics of the skyrmions motion through transport measurements and Lorentz TEM.

 

Publications @ UW-Madison

7) Dong Liang, Matthew J. Stolt and Song Jin, Metastable skyrmions: Beat the heatNature Physics, 2016, 12, 25–26, DOI: 10.1038/nphys3547

6) Dong Liang, John P. DeGrave, Matthew J. Stolt, Yoshinori Tokura and Song Jin, Current-driven dynamics of skyrmions stabilized in MnSi nanowires revealed by topological Hall effectNature Communications, 2015, 6, Article number: 8217, doi:10.1038/ncomms9217

5) Haifeng Du, Dong Liang, Chiming Jin, Lingyao Kong, Matthew J. Stolt, Wei Ning, Jiyong Yang, Ying Xing, Jian Wang, Renchao Che, Jiadong Zang, Song Jin, Yuheng Zhang, and Mingliang Tian, Electrical probing of field-driven cascading quantized transitions of skyrmion cluster states in MnSi nanowiresNat. Comm.2015, 6, doi:10.1038/ncomms8637

4) A. Mehlin, F. Xue, D. Liang, H. F. Du, M. J. Stolt, S. Jin, M. L. Tian, and M. Poggio, Stabilized Skyrmion Phase Detected in MnSi Nanowires by Dynamic Cantilever Magnetometry, Nano Lett.2015, 15(7), pp 4839-4844, DOI: 10.1021/acs.nanolett.5b02232

Other Publications

3) Regus, M., Kuhn, G., Polesya, S., Mankovsky, S., Alemayehu, M., Stolt, M. J., Johnson, D. C., Ebert, H., and Bensch, W. (2014). Experimental and theoretical investigation of the new, metastable compound Cr3Sb. Zeitschrift für Kristallographie- Crystalline Materials, 229 (7), 505-5152.

2) Moore, D. B., Stolt, M. J., Atkins, R., Sitts, L., Jones, Z., Disch, S., Beekman, M., and Johnson, D. C. (2012). Structural and electrical properties of (PbSe)1.16(TiSe2). Emerging Materials Research,1(6), 292-298., doi: 10.1680/emr.12.000241.      

1) Moore, D. B., Sitts, L., Stolt, M. J., Beekman, M., and Johnson, D. C. (2012). Characterization of Nonstoichiometric Ti1+xSe2 Prepared by the Method of Modulated Elemental Reactants. Jounal of Electronic Materials, doi: 10.1007/s11664-012-2361-6