Verba, R.V., Navas, D., Hierro-Rodriguez, A., Bunyaev, S.A., Ivanov, B.A., Guslienko, K.Y. and Kakazei, G.N. (2018) Overcoming the limits of vortex formation in magnetic nanodots by coupling to antidot matrix. Physical Review Applied, 10, 031002. (doi: 10.1103/PhysRevApplied.10.031002)
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Abstract
Static magnetic configurations of thin circular soft (permalloy) magnetic nanodots, coupled to a hard antidot matrix with perpendicular magnetization, are studied by micromagnetic simulations. It is demonstrated, that dipolar fields of the antidot matrix promotes the formation of a magnetic vortex state in nanodots. The vortex is the dot ground state at zero external field in ultrathin nanodots with diameters as low as 60 nm, that is far beyond the vortex stability range in an isolated permalloy nanodot. Depending on the geometry and antidot matrix material it is possible to stabilize either radial vortex state or unconventional vortices with the angle between in-plane magnetization and radial direction ψ ≠ 0 , π / 2 .
| Item Type: | Articles |
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| Additional Information: | The Portuguese team acknowledges the Network of Extreme Conditions Laboratories-NECL and Portuguese Foundation of Science and Technology (FCT) support through the projects NORTE-01-0145-FEDER-022096, MIT-EXPL/IRA/0012/2017, POCI-0145-FEDER-030085 (NOVAMAG), EXPL/IF/01191/2013 (D.N.), EXPL/IF/00 541/2015 (S.A.B.), EXPL/IF/00981/2013 (G.N.K), and SFRH/BPD/90471/2012 (A.H.-R.). This work was also supported by the Ministry of Education and Science of Ukraine, project No. 0118U004007 (R.V.V., B.A.I.); IKERBASQUE (the Basque Foundation for Science) (K.Y.G.); the Spanish MINECO, Grants No. FIS2016- 78591-C3-3-R (K.Y.G.) and No. FIS2016-76058-C4-4-R (A.H.-R.); the European Union Horizon 2020 Research and Innovation Programme under Marie SkłodowskaCurie Grants No. 644348 (R.V.V., B.A.I., K.Y.G.) and No. H2020-MSCA-IF-2016-746958 (A.H.-R.). B.A.I. was supported by the Program of NUST “MISiS” (Grant No. K2-2017-005), implemented by a governmental decree No. 211 dated March 16, 2013. G.N.K. acknowledges the support from European Cooperation in Science and Technology (COST) project CA16218 “NANOCOHYBRI.” |
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Hierro Rodriguez, Dr Aurelio |
| Authors: | Verba, R.V., Navas, D., Hierro-Rodriguez, A., Bunyaev, S.A., Ivanov, B.A., Guslienko, K.Y., and Kakazei, G.N. |
| College/School: | College of Science and Engineering > School of Physics and Astronomy |
| Journal Name: | Physical Review Applied |
| Publisher: | American Physical Society |
| ISSN: | 2331-7019 |
| ISSN (Online): | 2331-7019 |
| Copyright Holders: | Copyright © 2018 American Physical Society |
| First Published: | First published in Physics Review Applied 10:031002 |
| Publisher Policy: | Reproduced in accordance with the copyright policy of the publisher |
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