Acta Phys. -Chim. Sin. ›› 2014, Vol. 30 ›› Issue (4): 768-772.doi: 10.3866/PKU.WHXB201402114

• PHYSICAL CHEMISTRY OF MATERIALS • Previous Articles     Next Articles

Effects of Annealing on the Magnetic Properties of [NiFe/Cu/Co/Cu]n Multilayer Nanowire Arrays

ZHANG Wei-Guo, MA Xiao-Long, XU Yan, YAO Su-Wei, WANG Hong-Zhi   

  1. SUGIYAMA Laboratory of Surface Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, P. R. China
  • Received:2014-01-01 Revised:2014-01-26 Published:2014-03-31
  • Contact: WANG Hong-Zhi E-mail:wanghz@tju.edu.cn
  • Supported by:

    The project was supported by the Natural Science Foundation of Tianjin, China (G08JCZDJC17400).

Abstract:

Highly ordered [NiFe/Cu/Co/Cu]n multilayer nanowire arrays were successfully prepared by a combination of electrodeposition and the anodic aluminum oxide (AAO) template method. The crystalline structures obtained at different annealing temperatures were characterized by high-angle X-ray diffraction (XRD). The coercivity, remanence ratio, giant magneto resistive (GMR), and magnetic sensitivity of the [NiFe/Cu/Co/Cu]n multilayer nanowire arrays were investigated at different annealing temperatures. After heating, the multilayer nanowires magnetic microcrystalline orientation was more obvious and the crystal structure was more uniform. The multilayer nanowires coercivity and remanence ratio increased initially and then decreased at 300 ℃. A maximum coercivity and GMR value of 59% was achieved with a magnetic sensitivity of up to 0.233% Oe-1 at 300 ℃.

Key words: Multilayer nanowire arrys, Electrodeposition, Annealing, [NiFe/Cu/Co/Cu]n, Giant magnetoresistance

MSC2000: 

  • O646