Fabrication and magnetic properties of FeCo alloy nanotube array

Abstract

An array of FeCo nanotubes has been fabricated in the pores of porous anodic aluminum oxide templates. The morphology, structure, and composition of the nanotube array were characterized by transmission electron microscopy, x-ray diffraction, and atomic absorption spectroscopy. Magnetostatic energy analysis and transmission Mössbauer spectroscopy measurements were used to investigate the distribution of magnetic moments in nanotubes. Magnetization hysteresis loops indicate that, due to the unique shape of the nanotube, the nanotube array could be magnetized more easily by the field that is applied parallel to the axis of nanotubes.

Magnetic Interaction in FeCo Alloy Nanotube Array

“…The FeCo nanotubes used in this letter were fabricated by wetting templates method and hydrogen reduction in porous alumina templates [8][9][10][11][12]. The advantages of this method in the production of magnetic and other inorganic nanotubes are obvious, because of its simplicity, convenience, and capability of producing large quantities of samples.…”

“…In recent years, with the development of the methods for preparing magnetic nanotubes, the synthesis of tubular nanostructures and the studies on the magnetic properties of nanotubes are pioneered in magnetic nanotechnology. The methods for fabrication include: electroless deposition [6], electrodeposition [7], wetting templates [8][9][10][11][12] and so on. Because of the potential applications demonstrated by previous studies, such as nanomedicine and biotechnology [13], ultrahigh-density magnetic storage devices [14], and nano electromechanical system device [15], magnetic nanotubes have attracted more and more attention.…”

Magnetic correlations in ferromagnetic single-walled nanotubes

“…Following the discovery, different chemical compositions of the nanotubes have been successfully synthesized by various methods [2][3][4][5][6][7][8][9]. More recently, the enthusiasm of studying magnetic nanotubes (MNTs) has been rising from both experimental [10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26] and theoretical [27][28][29][30][31][32][33][34][35][36][37][38][39][40][41][42][43][44][45][46] standpoints due to their promising applications, such as ultrahigh-density magnetic storage devices, biomagnetic sensors, nanomedicine, molecular devices, catalysts, and nanoelectronic devices, etc. Research on MNTs is expanding into newer and broader fields, including both physical properties and possible unique applications in various areas.…”

Theoretical investigations of magnetic properties of ferromagnetic single-walled nanotubes

“…In particular, considerable efforts have been made in the area of quasi-one-dimensional (1D) nanostructured materials, such as nanotubes, nanowires, and nanorods. More recently, ferromagnetic (FM) nanotubes have been successfully fabricated by various methods [1][2][3][4][5], and their magnetic properties have been investigated experimentally [3][4][5][6][7][8][9]. Magnetic nanotubes have been attracting much attention due to their potential applications, such as ultrahigh-density magnetic storage devices, biotechnology, nanomedicine, and nanoelectronic devices, etc.…”