Magnetic Properties of Various Thick Co-Fe Circular Dot Arrays

Abstract:

We have studied the magnetic properties of Co-Fe circular dot arrays with various thicknesses and diameters in order to determine the optimum thickness and diameter of these dot arrays with a single-domain state for the transmission of spin information. For the thickness of 10 nm, the magnetic state changes from a multi-domain state to a closure-domain state and further to a single-domain state with decreasing diameter. On the other hand, for the thickness of 30 nm and 50 nm, all magnetic states are in a vortex state, regardless of the diameter. From these results, it is found that the optimum thickness and diameter of Co-Fe circular dots with a single-domain state are, respectively, 10 nm and less than 100 nm.

• Periodical: Solid State Phenomena (Volumes 124-126)
• Pages: 879-882
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.124-126.879
• Online since: June 2007
• Authors: Yasushi Endo, Yusuke Niimi, Ryoichi Nakatani, Yoshio Kawamura, Masahiko Yamamoto
• Keywords: Co-Fe, Magnetic Domain, Magnetism, Spin Information

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