Display options
Cite
Caspani S, Moraes S, Navas D, et al. The Magnetic Properties of Fe/Cu Multilayered Nanowires: The Role of the Number of Fe Layers and Their Thickness. Nanomaterials (Basel). 2021;11(10)doi: 10.3390/nano11102729.
Caspani, S., Moraes, S., Navas, D., Proenca, M. P., Magalhães, R., Nunes, C., Araújo, J. P., & Sousa, C. T. (2021). The Magnetic Properties of Fe/Cu Multilayered Nanowires: The Role of the Number of Fe Layers and Their Thickness. Nanomaterials (Basel, Switzerland), 11(10), . https://doi.org/10.3390/nano11102729
Caspani, Sofia, et al. "The Magnetic Properties of Fe/Cu Multilayered Nanowires: The Role of the Number of Fe Layers and Their Thickness." Nanomaterials (Basel, Switzerland) vol. 11,10 (2021). doi: https://doi.org/10.3390/nano11102729
Caspani S, Moraes S, Navas D, Proenca MP, Magalhães R, Nunes C, Araújo JP, Sousa CT. The Magnetic Properties of Fe/Cu Multilayered Nanowires: The Role of the Number of Fe Layers and Their Thickness. Nanomaterials (Basel). 2021 Oct 15;11(10). doi: 10.3390/nano11102729. PMID: 34685176; PMCID: PMC8538472.
Copy Download .nbib Format: NLM
Share it on

Nanomaterials (Basel). 2021 Oct 15;11(10). doi: 10.3390/nano11102729.

The Magnetic Properties of Fe/Cu Multilayered Nanowires: The Role of the Number of Fe Layers and Their Thickness.

Nanomaterials (Basel, Switzerland)

Sofia Caspani, Suellen Moraes, David Navas, Mariana P Proenca, Ricardo Magalhães, Cláudia Nunes, João Pedro Araújo, Célia T Sousa

Affiliations

  1. IFIMUP and Departamento de Física e Astronomia, Faculdade de Ciências Universidade do Porto, Rua do Campo Alegre 687, 4169-007 Porto, Portugal.
  2. ICMM-CSIC-Instituto de Ciencia de Materiales de Madrid, Sor Juana Inés de la Cruz 3, 28049 Madrid, Spain.
  3. ISOM and Dpto. Electrónica Física, Universidad Politécnica de Madrid, Avda. Complutense 30, 28040 Madrid, Spain.
  4. LAQV, REQUIMTE, Faculty of Pharmacy of Porto University, 4050-313 Porto, Portugal.

PMID: 34685176 PMCID: PMC8538472 DOI: 10.3390/nano11102729

Abstract

Multi-segmented bilayered Fe/Cu nanowires have been fabricated through the electrodeposition in porous anodic alumina membranes. We have assessed, with the support of micromagnetic simulations, the dependence of fabricated nanostructures' magnetic properties either on the number of Fe/Cu bilayers or on the length of the magnetic layers, by fixing both the nonmagnetic segment length and the wire diameter. The magnetic reversal, in the segmented Fe nanowires (NWs) with a 300 nm length, occurs through the nucleation and propagation of a vortex domain wall (V-DW) from the extremities of each segment. By increasing the number of bilayers, the coercive field progressively increases due to the small magnetostatic coupling between Fe segments, but the coercivity found in an Fe continuous nanowire is not reached, since the interactions between layers is limited by the Cu separation. On the other hand, Fe segments 30 nm in length have exhibited a vortex configuration, with around 60% of the magnetization pointing parallel to the wires' long axis, which is equivalent to an isolated Fe nanodisc. By increasing the Fe segment length, a magnetic reversal occurred through the nucleation and propagation of a V-DW from the extremities of each segment, similar to what happens in a long cylindrical Fe nanowire. The particular case of the Fe/Cu bilayered nanowires with Fe segments 20 nm in length revealed a magnetization oriented in opposite directions, forming a synthetic antiferromagnetic system with coercivity and remanence values close to zero.

Keywords: Fe/Cu bilayers; magnetization reversal; nanowires; porous anodic alumina membranes

References

  1. Nanoscale. 2015 May 14;7(18):8233-60 - PubMed
  2. Nanotechnology. 2016 Aug 19;27(33):335301 - PubMed
  3. Chem Rev. 2014 Aug 13;114(15):7487-556 - PubMed
  4. ACS Appl Mater Interfaces. 2015 Apr 8;7(13):7389-96 - PubMed
  5. Sci Rep. 2017 Sep 14;7(1):11576 - PubMed
  6. Nanoscale. 2018 Mar 29;10(13):5923-5927 - PubMed
  7. Materials (Basel). 2019 Nov 26;12(23): - PubMed
  8. J Phys Condens Matter. 2016 Dec 7;28(48):483002 - PubMed
  9. Phys Rev Lett. 2018 Aug 31;121(9):097202 - PubMed
  10. Nanotechnology. 2016 Sep 23;27(43):435705 - PubMed
  11. Nanomaterials (Basel). 2018 Jul 04;8(7): - PubMed
  12. Nanotechnology. 2017 Mar 3;28(9):095709 - PubMed

Publication Types