Measuring the formation energy barrier of skyrmions in zinc-substituted Cu2OSeO3
Wilson, M.N.; Crisanti, M.; Barker, C.; Štefančič, A.; White, J.S.; Birch, M.T.; Balakrishnan, G.; Cubitt, R.; Hatton, P.D.
Professor Peter Hatton firstname.lastname@example.org
We report small-angle neutron scattering (SANS) measurements of the skyrmion lattice in (Cu0.976Zn0.024 )2OSeO3 under the application of electric and magnetic fields. These measurements show an expansion of the skyrmion lattice stability region with electric field. Furthermore, using time-resolved SANS, we observe the slow formation of skyrmions after an electric or magnetic field is applied, which has not been observed in pristine Cu2OSeO3 crystals. The measured formation times are dramatically longer than the corresponding skyrmion annihilation times after the external field is removed, and increase exponentially from 100 s at 52.5 K to 10 000 s at 51.5 K. This thermally activated behavior indicates an energy barrier for skyrmion formation of 1.57(2) eV, the size of which demonstrates the huge cost for creating these complex chiral objects.
Wilson, M., Crisanti, M., Barker, C., Štefančič, A., White, J., Birch, M., …Hatton, P. (2019). Measuring the formation energy barrier of skyrmions in zinc-substituted Cu2OSeO3. Physical Review B, 99(17), Article 174421. https://doi.org/10.1103/physrevb.99.174421
|Journal Article Type||Article|
|Online Publication Date||May 22, 2019|
|Publication Date||May 1, 2019|
|Deposit Date||May 24, 2019|
|Publicly Available Date||May 24, 2019|
|Journal||Physical Review B|
|Publisher||American Physical Society|
|Peer Reviewed||Peer Reviewed|
Published Journal Article
Reprinted with permission from the American Physical Society: Wilson, M. N., Crisanti, M., Barker, C., Štefančič, A., White, J. S., Birch, M. T., Balakrishnan, G., Cubitt, R. & Hatton, P. D. (2019). Measuring the formation energy barrier of skyrmions in zinc-substituted Cu2OSeO3. Physical Review B 99(17): 174421 © 2019 by the American Physical Society. Readers may view, browse, and/or download material for temporary copying purposes only, provided these uses are for noncommercial personal purposes. Except as provided by law, this material may not be further reproduced, distributed, transmitted, modified, adapted, performed, displayed, published, or sold in whole or part, without prior written permission from the American Physical Society.
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