Dynamics of field-driven domain-wall propagation in ferromagnetic nanowires

ABSTRACT Ferromagnetic nanowires are likely to play an important role in future spintronic devices. Magnetic domain walls, which separate regions of opposing magnetization in a nanowire, can

be manipulated1,2,3,4,5,6 and used to encode information for storage2,7 or to perform logic operations1. Owing to their reduced size and dimensionality, the characterization of domain-wall

motion is an important problem. To compete with other technologies, high-speed operation, and hence fast wall propagation, is essential. However, the domain-wall dynamics in nanowires has

only been investigated8,9,10,11,12,13 in the last five years and some results indicate a drastic slowing down of wall motion in higher magnetic fields8. Here we show that the velocity-field

characteristic of a domain wall in a nanowire shows two linear regimes, with the wall mobility at high fields reduced tenfold from that at low fields. The transition is marked by a region of

negative differential mobility and highly irregular wall motion. These results are in accord with theoretical predictions that, above a threshold field, uniform wall movement gives way to

turbulent wall motion, leading to a substantial drop in wall mobility13,14,15,16,17,18,19. Our results help resolve contradictory reports of wall propagation velocities in laterally confined

geometries8,9, and underscore the importance of understanding and enhancing the breakdown field for practical applications. Access through your institution Buy or subscribe This is a

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WALL DYNAMICS BY SHAPING NANOWIRES CROSS-SECTIONS Article Open access 14 December 2020 MICROMAGNETIC INSIGHTS ON IN-PLANE MAGNETIZATION ROTATION AND PROPAGATION OF MAGNETIZATION WAVES IN

NANOWIRES Article Open access 18 August 2023 ANALYTICAL AND EMPIRICAL CORRELATION BETWEEN MAGNETIC DOMAIN WALL CREEP BEHAVIOR AND FUNDAMENTAL MAGNETIC PROPERTIES Article Open access 13 April

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Google Scholar  Download references ACKNOWLEDGEMENTS This work was supported by the NSF (NIRT program) under DMR-0404252 and by the R. A. Welch Foundation (F-1015). Instrumentation used in

this work was developed and purchased through support from the NSF (IMR program) DMR-0216726 and from the Texas Coordinating Board (ATP-0099). Nanowires were fabricated using facilities of

the Center for Nano and Molecular Science and Technology at UT Austin, supported in part by the R. A. Welch Foundation and by SPRING. AUTHOR INFORMATION AUTHORS AND AFFILIATIONS * Department

of Physics, The University of Texas at Austin, Austin, Texas, 78712-0264, USA Geoffrey S. D. Beach, Corneliu Nistor, Carl Knutson, Maxim Tsoi & James L. Erskine Authors * Geoffrey S. D.

Beach View author publications You can also search for this author inPubMed Google Scholar * Corneliu Nistor View author publications You can also search for this author inPubMed Google

Scholar * Carl Knutson View author publications You can also search for this author inPubMed Google Scholar * Maxim Tsoi View author publications You can also search for this author inPubMed

 Google Scholar * James L. Erskine View author publications You can also search for this author inPubMed Google Scholar CORRESPONDING AUTHOR Correspondence to Geoffrey S. D. Beach. ETHICS

DECLARATIONS COMPETING INTERESTS The authors declare no competing financial interests. RIGHTS AND PERMISSIONS Reprints and permissions ABOUT THIS ARTICLE CITE THIS ARTICLE Beach, G., Nistor,

C., Knutson, C. _et al._ Dynamics of field-driven domain-wall propagation in ferromagnetic nanowires. _Nature Mater_ 4, 741–744 (2005). https://doi.org/10.1038/nmat1477 Download citation *

Received: 27 May 2005 * Accepted: 04 August 2005 * Published: 25 September 2005 * Issue Date: 01 October 2005 * DOI: https://doi.org/10.1038/nmat1477 SHARE THIS ARTICLE Anyone you share the

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