Abstract
Interface coupling-induced and interface coupling-enhanced magnetoimpedance (MI) effect in heterogeneous nanobrush has been investigated. The nanobrush is composed of Fe25Ni75 nanofilm and textured hexagonal close-packed cobalt nanowire array, respectively fabricated by RF magnetron sputtering and electrochemical deposition. The design of this structure is based on the vortex distribution of magnetic moments in thin film, which can be induced by the exchange coupling effect at the interfaces of the nanobrush. The texture of nanowires plays an important role in the MI effect of the nanobrush, which is regulated by controlling the pH values and temperatures of the deposition process. The ‘parallel’ and ‘perpendicular’ coupling models were used to explain the different MI results of the nanobrush with cobalt nanowires, which have (100) and (002) textures, respectively. The optimized MI effect of the nanobrush brought by (100) nanowires can be magnified by 300% with more than 80%/Oe magnetic sensitivity at a low frequency, which has great application potentials in low-frequency MI sensors.
Highlights
In recent years, low-dimensional nanomaterials have attracted considerable attention due to their potential application in many areas [1]
The anodized aluminum oxide (AAO) templates were used to fabricate the nanobrush, and the cross profile of the nanobrush was revealed from the microscopic investigations
A scanning electron microscopy image of self-ordered AAO templates is taken in top view (Figure 2a)
Summary
Low-dimensional nanomaterials have attracted considerable attention due to their potential application in many areas [1]. One-dimensional nanowires with large shape anisotropy and surface area have attracted much attention, which will be useful in a wealth of applications that include catalysis, magnetic recording, and some physical fundamental researches [2,3]. Two-dimensional magnetic nanofilm is widely used for various kinds of magnetic sensors, planar inductors, and so on [4,5]. Great efforts have been made to combine different structures for three-dimensional multifunction materials. Qin et al fabricated a microfiber-nanowire hybrid structure for energy scavenging, and Yan et al fabricated threedimensional metal-graphene nanotube multifunctional hybrid materials [6,7]. In a magnetic composite material, the exchange coupling effect at the
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
