Shape anisotropy and hybridization enhanced magnetization in nanowires of Fe/MgO/Fe encapsulated in carbon nanotubes

被引：1
|
作者：
Aryee, Dennis [1 ]
Seifu, Dereje [2 ]
机构：
[1] Army Res Lab, Weap & Mat Res Directorate, Aberdeen Proving Ground, MD 21005 USA
[2] Morgan State Univ, Dept Phys & Engn Phys, Baltimore, MD 21251 USA
来源：
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2017年 / 429卷
关键词：
Nanowires; Fe; Magnetoresistance; Anisotropy; Sputtering; ROOM-TEMPERATURE; MAGNETORESISTANCE; REVERSAL; MGO; FE;
D O I：
10.1016/j.jmmm.2017.01.014
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Arrays of tunneling magnetoresistance (TMR) nanowires were synthesized for the first time by filling Fe/MgO/Fe inside vertically grown and substrate supported carbon nanotubes. The magnetic properties of nanowires and planar nanoscale thin films of Fe/MgO/Fe showed several similarities, such as two-fold magnetic symmetry and ratio of orbital moment to spin moment. Nanowires of Fe/MgO/Fe showed higher saturation magnetization by a factor of 2.7 compared to planar thin films of Fe/MgO/Fe at 1.5 kOe. The enhanced magnetic properties likely resulted from shape anisotropy of the nanowires and as well as the hybridization that occur between the pelectronic states of carbon and 3d-bands of the Fe-surface.
引用
收藏
页码：161 / 165
页数：5
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