科研之友
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摘要
The static magnetization of cobalt nanocylinders electrodeposited into nanoporous alumina template is measured by vibrating sample magnetometry. The dynamics of the magnetization is analyzed by means of Brillouin light scattering. X-ray diffraction measurements suggest that the nanocylinders present a hexagonal structure with no preferential c-axis orientation, yielding vanishing average magnetocrystalline anisotropy. The dipolar coupling, calculated through the mean field approach, enables to interpret both static and dynamic experimental data. Moreover, the fitted exchange constant deduced from hysteresis loops or from spin wave spectra is found to be close to the bulk value.
- 出版日期2013-12
