Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/14132
Title: Magnetic anisotropy and coercivity in magnetic thin films
Authors: WANG SHUANG
Keywords: magnetic anisotropy coercivity thin films ferrite
Issue Date: 11-Oct-2004
Source: WANG SHUANG (2004-10-11). Magnetic anisotropy and coercivity in magnetic thin films. ScholarBank@NUS Repository.
Abstract: Magnetocrystalline anisotropy was investigated in Al doped barium ferrite (Al-BaM) nanoparticles and thin films. Doping of Al leads to a higher coercivity in BaAl2Fe10O19 nanoparticles. Shape anisotropy was studied in sputtered nickel thin films. A columnar structure, which might induce the shape anisotropy, was found by our TEM observations. Both SiO2 doped and pure cobalt ferrite thin films were synthesized using a sputtering method in order to study the stress-induced anisotropy. After adding a small amount of SiO2 to cobalt ferrite, the deposited films on the naturally oxidized silicon substrate exhibited a strong perpendicular anisotropy, while the pure cobalt ferrite films showed magnetic isotropy. All along our study we considered that anisotropies: -magnetocrystalline anisotropy, shape anisotropy, and stress-induced anisotropy play an important role in magnetic materials, especially in thin films, and any of them may be predominant in special circumstances.
URI: http://scholarbank.nus.edu.sg/handle/10635/14132
Appears in Collections:Master's Theses (Open)

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