News Column

New Nanowires Findings Reported from University of Wisconsin

May 27, 2014

By a News Reporter-Staff News Editor at Physics Week -- Current study results on Nanowires have been published. According to news reporting from Madison, Wisconsin, by VerticalNews journalists, research stated, "Topologically stable magnetic skyrmions realized in B20 metal suicide or germanide compounds with helimagnetic order are very promising for magnetic memory and logic devices. However, these applications are hindered because the skyrmions only survive in a small temperature-field (T-H) pocket near the critical temperature T-c in bulk materials."

The news correspondents obtained a quote from the research from the University of Wisconsin, "Here we demonstrate that the skyrmion state in helimagnetic MnSi nanowires with varied sizes from 400 to 250 nm can exist in a substantially extended T H region. Magnetoresistance measurements under a moderate external magnetic field along the long axis of the nanowires (H-parallel to) show transitions corresponding to the skyrmion state from T-c similar to 32 K down to at least 3 K, the lowest temperature in our measurement. When the field is applied perpendicular to the wire axis (H-perpendicular to), the skyrmion state was not resolvable using the magnetoresistance measurements."

According to the news reporters, the research concluded: "Our analysis suggests that the shape-induced uniaxial anisotropy might be responsible for the stabilization of skyrmion state observed in nanowires."

For more information on this research see: Highly Stable Skyrmion State in Helimagnetic MnSi Nanowires. Nano Letters, 2014;14(4):2026-2032. Nano Letters can be contacted at: Amer Chemical Soc, 1155 16TH St, NW, Washington, DC 20036, USA. (American Chemical Society -; Nano Letters -

Our news journalists report that additional information may be obtained by contacting H.F. Du, University of Wisconsin, Dept. of Chem, Madison, WI 53706, United States. Additional authors for this research include J.P. DeGrave, F. Xue, D. Liang, W. Ning, J.Y. Yang, M.L. Tian, Y.H. Zhang and S. Jin.

Keywords for this news article include: Madison, Physics, Wisconsin, United States, Nanotechnology, Magnetoresistance, Emerging Technologies, North and Central America

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Source: Physics Week

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