Fabrication and characterization of multi-walled carbon nanotube incorporated ferromagnetic nanowires with self-formed anti-oxidation layers

• Published in: Materials research bulletin Vol. 48; no. 3; pp. 948 - 954
• Main Authors: Kweon, Soon-Cheol, Kim, Sang Woo
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.03.2013
• Subjects: A. Magnetic materials; A. Nanostructures; B. Chemical synthesis; C. X-ray diffraction; D. Magnetic properties; B. Chemical synthesis; A. Magnetic materials; A. Nanostructures; D. Magnetic properties; C. X-ray diffraction
• ISSN: 0025-5408; 1873-4227
• DOI: 10.1016/j.materresbull.2012.11.055

[Display omitted] ► Facile synthesis of carbon nanotube incorporated electrospun FeCoNi nanowires. ► With a well-crystallized bcc (110) texture and self-formed anti-oxidation layer. ► Electrospun nanowires exhibited superior room temperature coercivity of 1050 Oe. ► No significant temperature dependence of coercivity was shown. Ferromagnetic FeCoNi alloy nanowires (NWs) with self-formed anti-oxidation (Si/Al) layers were prepared via electrospinning a sol–gel precursor solution containing Si and Al element and multi-walled carbon nanotubes (MWNTs), and their structures and magnetic properties were investigated. The uniform and narrow-sized MWNTs-magnetic alloy NWs with a well-crystallized bcc (110) texture of FeCo along the easy axis were formed by introduction of MWNTs acted as a sintering inhibitor during annealing. The coercive field at room temperature increased two times higher than that of MWNT-free magnetic NWs due to the well-developed texture and the small grain size, which is slightly larger than the single domain size within the 10–15nm range for most magnetic metals. As a result, the highly enhanced ferromagnetic NW mats with a MWNT-incorporated nanowire structure have shown great promise for providing a wide range of potential applications, including magnetic recording and ultrahigh-density magnetic storage devices operating room temperature.