Direct observation of transverse and vortex metastable magnetic domains in cylindrical nanowires

C. Bran, J. A. Fernandez-Roldan, E. M. Palmero, E. Berganza, J. Guzman, R. P. del Real, A. Asenjo, A. Fraile Rodríguez, M. Foerster, L. Aballe, O. Chubykalo-Fesenko, and M. Vazquez
Phys. Rev. B 96, 125415 – Published 11 September 2017
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Abstract

We present experimental evidence of transverse magnetic domains, previously observed only in nanostrips, in CoNi cylindrical nanowires with designed crystal symmetry and tailored magnetic anisotropy. The transverse domains are found together with more conventional vortex domains along the same cylindrical nanowire, denoting a bistable system with similar energies. The surface and the inner magnetization distribution in both types of domains are analyzed by photoemission electron microscopy with x-ray magnetic circular dichroism contrast, and hysteresis loop in individual nanowires are measured by magneto-optical Kerr effect. These experimental data are understood and compared with complementary micromagnetic simulations.

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  • Received 12 May 2017
  • Revised 29 June 2017

DOI:https://doi.org/10.1103/PhysRevB.96.125415

©2017 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

C. Bran1,*, J. A. Fernandez-Roldan1, E. M. Palmero1,†, E. Berganza1, J. Guzman1, R. P. del Real1, A. Asenjo1, A. Fraile Rodríguez2,3, M. Foerster4, L. Aballe4, O. Chubykalo-Fesenko1, and M. Vazquez1

  • 1Institute of Materials Science of Madrid, CSIC, 28049 Madrid, Spain
  • 2Departament de Física de la Matèria Condensada, Universitat de Barcelona, 08028 Barcelona, Spain
  • 3Institut de Nanociència i Nanotecnologia (IN2UB), Universitat de Barcelona, 08028 Barcelona, Spain
  • 4Alba Synchrotron Light Facility, CELLS, Barcelona, Spain

  • *Corresponding author: cristina.bran@icmm.csic.es
  • Present address: IMDEA Nanociencia, C/Faraday, 9, 28049 Madrid, Spain.

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Issue

Vol. 96, Iss. 12 — 15 September 2017

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