Micromagnetic Properties and Magnetization Reversal of Ni Nanoparticles Studied by Magnetic Force Microscopy
RUSSIAN ACADEMY OF SCIENCES KAZAN PHYSICAL TECHNICAL INST
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Ni nanoparticles with sizes ranging from 40 to 400 nm formed by thermal annealing of thin film were investigated by atomic and magnetic force microscopy in situ in presence of applied nmgnetic field up to 300 Oe. By comparison of the corresponding experimental AFM and MFM images and computer simulated MFM images, the small particles with diameter below 100 nm were found to be in single domain state. The the direction of total magnetization of greater particles is defined by their shape anisotropy. The MFM image features and the magnetization reversal mechanism of such particles are explained in terms of a vortex magnetization.
- Solid State Physics
- Inorganic Chemistry
- Metallurgy and Metallography