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- Title
Tailoring the magnetic properties of the cobalt nanowires array by optimizing the geometrical nanopores of the template.
- Authors
Afsar, Mahmoud; Paimozd, Ebrahim; Ghasemi, Ali; Nasr-Esfahani, Mohammad Reza
- Abstract
In this work, highly ordered cobalt nanowires array were successfully electrodeposited in an anodic aluminum oxide (AAO) template. The first-step anodization times (FSATs), including 6, 12, 18, and 30 h, were performed to approach ordered nanopores. Increasing the anodization time made a self-organized arrangement of nanopores with a narrow Gaussian pore diameter distribution. By adjusting the anodizing process, the coercivity of the cobalt nanowire arrays increases from 1060 to 2040 Oe. The soft and hard magnetic phases were identified by FORC diagrams according to the crystallographic plane's XRD patterns. FORC diagrams and switching field distribution (SFD) revealed the intra-wire magnetostatic interaction between hard and soft phases, which weakens the remanence magnetization. The nucleation and growth of the (002) hcp-cobalt in the electrodeposition process enhanced the coercivity of the individual nanowire to 4000 Oe that arose from the long time of the first step of anodizing duration AAO template fabrication.
- Subjects
MAGNETIC properties; COBALT; NANOWIRES; DISCONTINUOUS precipitation; REMANENCE; NANOPORES; X-ray diffraction
- Publication
Applied Physics A: Materials Science & Processing, 2024, Vol 130, Issue 1, p1
- ISSN
0947-8396
- Publication type
Article
- DOI
10.1007/s00339-023-07152-5