Annealing effects on the magnetic properties of highly-packed vertically-aligned nickel nanotubes. Issue 30 (28th March 2017)

• Record Type: Journal Article
• Authors: Antohe, Vlad-Andrei; Nysten, Emeline; Martínez-Huerta, Juan Manuel; Pereira de Sá, Pedro Miguel; Piraux, Luc
• Is Part Of: RSC advances. Volume 7:Issue 30(2017)
• Page Start: 18609
• Page End: 18616
• Publication Date: 2017-03-28
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c7ra01276d
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : Hysteresis loops showing the decrease of the saturation magnetic moment (left) through a dense array of vertically-aligned Ni nanotubes after their progressive thermal conversion into hybrid ferromagnetic/antiferromagnetic Ni/NiO nanotubes (right). Abstract : We reported an efficient way of preparing large and dense ferromagnetic arrays of vertically-aligned Ni nanotubes (NTs). The synthesis method allowed then for a direct, effective and controllable thermal conversion of the as-prepared Ni NTs into heterostructured Ni/NiO NTs, without compromising the nanostructures' verticality to the substrate and their initial tubular integrity. Next, we demonstrated the ability to tune the dipolar interaction field (DIF) in this array of one-dimensional (1D) Ni/NiO heterostructures, just by slightly changing the thickness of the antiferromagnetic NiO layer. Furthermore, the proposed fabrication method assures full compatibility with the standard Si processing, providing thus a direct pathway towards large-scale integrability and manufacturing of a new generation of magnetic devices relying on dense arrays of vertical 1D magnetic nanostructures.