Bloch-point-mediated topological transformations of magnetic domain walls in cylindrical nanowires

Wartelle A, Trapp B, Stano M, Thirion C, Bochmann S, Bachmann J, Foerster M, Aballe L, Mentos TO, Locatelli A, Sala A, Cagnon L, Toussaint JC, Fruchart O (2019)

Publication Status: Published

Publication Type: Journal article, Original article

Publication year: 2019

Journal

Physical Review B American Physical Society

Publisher: AMER PHYSICAL SOC

Book Volume: 99

Article Number: ARTN 024433

Journal Issue: 2

DOI: 10.1103/PhysRevB.99.024433

Abstract

Cylindrical nanowires made of soft magnetic materials, in contrast to thin strips, host domain walls of two distinct topologies. Following 15 years of theoretical predictions of the unique dynamic features of such walls, such as absence of Walker breakdown, we report on experiments here. Unexpectedly, we evidence the dynamic transformation of topology upon wall motion above a field threshold, a phenomenon that had been previously overlooked. Micromagnetic simulations highlight the underlying phenomenon for one type of transformation, involving the nucleation of a Bloch-point singularity. This calls for reexamining existing predictions, and further experiments to highlight the conditions favoring the transformation.

Authors with CRIS profile

Sebastian Bochmann Lehrstuhl für Chemistry of thin film materials Julien Bachmann Lehrstuhl für Chemistry of thin film materials

Involved external institutions

CELLS ALBA Synchrotron (Consorcio para la Construcción, Equipamiento y Explotación del Laboratorio de Luz de Sincrotrón) ES Spain (ES) University of Grenoble Alpes (UGA) / Université de Grenoble FR France (FR) Elettra Sincrotrone Trieste S.C.p.A. IT Italy (IT)

How to cite

APA:

Wartelle, A., Trapp, B., Stano, M., Thirion, C., Bochmann, S., Bachmann, J.,... Fruchart, O. (2019). Bloch-point-mediated topological transformations of magnetic domain walls in cylindrical nanowires. Physical Review B, 99(2). https://dx.doi.org/10.1103/PhysRevB.99.024433

MLA:

Wartelle, A., et al. "Bloch-point-mediated topological transformations of magnetic domain walls in cylindrical nanowires." Physical Review B 99.2 (2019).

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