Individually grown cobalt nanowires as magnetic force microscopy probes
Autor: | Kadir Aslan, Ayodeji Afolabi, Joshua Samba, A. Lisfi, Shuaa Alotaibi, Ilyas Unlu, Yucheng Lan, Bret N. Flanders, Birol Ozturk, Gobind Basnet, Kelechi Uradu, S. Pokharel |
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Rok vydání: | 2017 |
Předmět: |
Materials science
Physics and Astronomy (miscellaneous) Anisotropy energy business.industry Nanowire chemistry.chemical_element 02 engineering and technology 021001 nanoscience & nanotechnology Magnetic hysteresis Magnetocrystalline anisotropy 01 natural sciences Magnetic anisotropy Nanolithography chemistry 0103 physical sciences Optoelectronics Magnetic force microscope 010306 general physics 0210 nano-technology business Cobalt Magnetics and Spintronics |
Zdroj: | Applied physics letters. 112(9) |
ISSN: | 0003-6951 |
Popis: | AC electric fields were utilized in the growth of individual high-aspect ratio cobalt nanowires from simple salt solutions using the Directed Electrochemical Nanowire Assembly method. Nanowire diameters were tuned from the submicron scale to 40 nm by adjusting the AC voltage frequency and the growth solution concentration. The structural properties of the nanowires, including shape and crystallinity, were identified using electron microscopy. Hysteresis loops obtained along different directions of an individual nanowire using vibrating sample magnetometry showed that the magnetocrystalline anisotropy energy has the same order of magnitude as the shape anisotropy energy. Additionally, the saturation magnetization of an individual cobalt nanowire was estimated to be close to the bulk single crystal value. A small cobalt nanowire segment was grown from a conductive atomic force microscope cantilever tip that was utilized in magnetic force microscopy (MFM) imaging. The fabricated MFM tip provided moderate quality magnetic images of an iron-cobalt thin-film sample. |
Databáze: | OpenAIRE |
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