TY  - JOUR
AU  - Chai, Ke
AU  - Li, Zikang
AU  - Huang, Wenting
AU  - Richter, Gunther
AU  - Liu, Ruibin
AU  - Zou, Bingsuo
AU  - Caron, Jan
AU  - Kovács, András
AU  - Dunin-Borkowski, Rafal E.
AU  - Li, Jianqi
TI  - Magnetic quantification of single-crystalline Fe and Co nanowires via off-axis electron holography
JO  - The journal of chemical physics
VL  - 152
IS  - 11
SN  - 1089-7690
CY  - Melville, NY
PB  - American Institute of Physics
M1  - FZJ-2020-02733
SP  - 114202 -
PY  - 2020
AB  - Investigating the local micromagnetic structure of ferromagnetic nanowires (NWs) at the nanoscale is essential to study the structure–property relationships and can facilitate the design of nanostructures for technology applications. Herein, we synthesized high-quality iron and cobalt NWs and investigated the magnetic properties of these NWs using off-axis electron holography. The Fe NWs are about 100 nm in width and a few micrometers in length with a preferential growth direction of [100], while the Co NWs have a higher aspect-ratio with preferential crystal growth along the [110] direction. It is noted that compact passivation surface layers of oxides protect these NWs from further oxidation, even after nearly two years of exposure to ambient conditions; furthermore, these NWs display homogeneous ferromagnetism along their axial direction revealing the domination of shape anisotropy on magnetic behavior. Importantly, the average value of magnetic induction strengths of Fe NWs (2.07 {±} 0.10 T) and Co NWs (1.83 {±} 0.15 T) is measured to be very close to the respective theoretical value, and it shows that the surface oxide layers do not affect the magnetic moments in NWs. Our results provide a useful synthesis approach for the fabrication of single-crystalline, defect-free metal NWs and give insight into the micromagnetic properties in ferromagnetic NWs based on the transmission electron microscopy measurements.
LB  - PUB:(DE-HGF)16
C6  - pmid:32199423
UR  - <Go to ISI:>//WOS:000521975000001
DO  - DOI:10.1063/1.5145337
UR  - https://juser.fz-juelich.de/record/878264
ER  -