CoFe Layers Thickness and Annealing Effect on the Magnetic Behavior of the CoFe/Cu Multilayer Nanowires

Cofe/cu  multilayer  nanowires  were  electrodeposited  into  anodic aluminum  oxide  templates prepared by  a  two-step mild  anodization method,  using  the  single-bath  technique.  nanowires  with  30  nm diameter and  the definite  lengths were obtained. the effect of cofe layers  thickness  and  annealing  on  the  magnetic  behavior  of  the multilayer  nanowires  was  investigated.  the  layers  thickness  was controlled  through  the  pulses  numbers:  200,  260,  310,360  and  410 pulses were used to deposit the cofe  layers, while 300 pulse for the cu  layers.  a  certain  increase  in  coercivity  and  squareness  of cofe/cu  multilayer  nanowires  observed  with  increasing  the  cofe layer  thickness  and  annealing  improved  the  coercivity  and  decrease squareness  of  cofe/cu  multilayer  nanowires.  first  order  reversal curves  after  annealed  showed  amount  domains  with  soft  magnetic phase,  it  also  shows  decreasing  spreading  of  distribution  function along the   axis after annealed