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Fe48Co52 Alloy Nanowire Arrays: Effects of Magnetic Field Annealing
Hai-lin Su *,Shao-long Tang*,Rui-long Wang,Yi-qing Chen,Chong Jia,You-wei Du
Author NameAffiliationE-mail
Hai-lin Su * School of Materials Science and Engineering,Hefei University of Technology,Hefei 230009, China;National Laboratory of Solid State Microstructure and Department of Physics, Nanjing University,Nanjing 210093, China suhlnju@yahoo.com.cn 
Shao-long Tang* National Laboratory of Solid State Microstructure and Department of Physics, Nanjing university,Nanjing 210093, China  
Rui-long Wang National Laboratory of Solid State Microstructure and Department of Physics, Nanjing University,Nanjing 210093, China  
Yi-qing Chen School of Materials Science and Engineering,Hefei University of Technology,Hefei 230009, China  
Chong Jia School of Materials Science and Engineering,Hefei University of Technology,Hefei 230009, China  
You-wei Du National Laboratory of Solid State Microstructure and Department of Physics, Nanjing University,Nanjing 210093, China  
Abstract:
The effects of magnetic field annealing on the properties of Fe48Co52 alloy nanowire arrayswith various interwire distances (Di=30-60 nm) and wire diameters (Dw=22-46 nm) wereinvestigated in detail. It was found that the array's best annealing temperature and crystalline structure did not show any apparent dependence on the treatment of applying a 3 kOe magnetic field along the wire during the annealing process. For arrays with small Dw or with large Di, the treatment of magnetic field annealing also had no obvious in°uence on their magnetic performances. However, such a magnetic field annealing constrained the shift of the easy magnetization direction and improved the coercivity and the squareness obviously for arrays with large Dw or with small Di. The difference in the intensity of the effective anisotropic field within the arrays was believed to be responsible for this different variationof the array's magnetic properties after magnetic field annealing.
Key words:  FeCo alloy, Nanowire array, Magnetic field annealing, Magnetic property,Effective anisotropic field
FundProject:
Fe48Co52 Alloy Nanowire Arrays: Effects of Magnetic Field Annealing
苏海林 *,唐少龙 *,王瑞龙,陈翌庆,贾冲,都有为
摘要:
详细研究了磁场退火对于具有不同线间距(30~60 nm)和不同线直径(22~46 nm)的Fe48Co52合金纳米线阵列性能的影响.研究表明,退火过程中沿纳米线方向施加3kOe的磁场对于阵列的最佳退火温度和晶体结构以及线直径较小或线间距较大阵列的磁性能均无明显影响.但是对于具有较大线直径或较小线间距的阵列,这种磁场退火处理限制了其易磁化方向的转动并明显提高了其矫顽力与矩形度.认为不同阵列内部有效各向异性场强度之间所存在的差异是导致磁场退火后阵列磁性能出现不同变化的主要原因.
关键词:  FeCo合金,纳米线阵列,磁场退火,磁性能,有效各向异性场
DOI:10.1088/1674-0068/22/01/82-86
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