Magnetic Properties of Electrospun Magnetic Nanofiber Mats after Stabilization and Carbonization

Abstract

Magnetic nanofibers are of great interest in basic research, as well as for possible applications in spintronics and neuromorphic computing. Here we report on the preparation of magnetic nanofiber mats by electrospinning polyacrylonitrile (PAN)/nanoparticle solutions, creating a network of arbitrarily oriented nanofibers with a high aspect ratio. Since PAN is a typical precursor for carbon, the magnetic nanofiber mats were stabilized and carbonized after electrospinning. The magnetic properties of nanofiber mats containing magnetite or nickel ferrite nanoparticles were found to depend on the nanoparticle diameters and the potential after-treatment, as compared with raw nanofiber mats. Micromagnetic simulations underlined the different properties of both magnetic materials. Atomic force microscopy and scanning electron microscopy images revealed nearly unchanged morphologies after stabilization without mechanical fixation, which is in strong contrast to pure PAN nanofiber mats. While carbonization at 500 °C left the morphology unaltered, as compared with the stabilized samples, stronger connections between adjacent fibers were formed during carbonization at 800 °C, which may be supportive of magnetic data transmission.

Micromagnetic Simulations of Fe and Ni Nanodot Arrays Surrounded by Magnetic or Non-Magnetic Matrices

“…The magnetic properties and magnetization reversal of single nanoparticles or nanoparticle arrays are defined by the dimensions and shapes of the nanoparticles, as well as by their material. This interplay between magneto-crystalline and shape anisotropy can lead to unexpected and technologically applicable effects [ 1 , 2 ]. Round and square nanodots, nanodot arrays, and antidot arrays are often examined since they allow for building vortices with reduced in-plane stray fields [ 3 , 4 , 5 , 6 , 7 , 8 ].…”

Preparation and Magnetic Properties of CoFe2O4 Oriented Fiber Arrays by Electrospinning

“…Therefore, the preparation of aligned nanofibers has important engineering application value in the sensor, electronic, and tissue engineering fields. Aligning nanofiber components will play a vital role in future nanotechnology development [ 11 , 12 ]. The magnetic domain arrangement of nanoparticles, disordered, and aligned nanofibers are the focus of current research.…”

Electron-Beam Irradiation of the PLLA/CMS/β-TCP Composite Nanofibers Obtained by Electrospinning

“…Nanofibers have acquired huge interest in the past few decades due their great properties that can be used in a wide range of applications. Nanofibers can provide great surface area over volume, high connected pores, and good mechanical properties [1][2][3][4]. Due to their unique properties, nanofibers have become potential candidates that can be used in various fields such as filtration, electronics, textile, tissue engineering, and drug-delivery systems [5][6][7][8][9][10][11][12][13].…”