Dipolar interactions in arrays of nickel nanowires studied by ferromagnetic resonance
(2001) Physical Review. B, Condensed Matter — Vol. 6310, n° 10 (2001)
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- Abstract
- Using a planar microstrip transmission line, the dipolar interactions in electrodeposited Ni nanowires arrays an characterized as a function of the membrane porosity (4% to 38%) and the wire diameter (56 to 250 nm). The dipolar interactions between the wires can be modeled in a mean-field approach as an effective uniaxial anisotropy field oriented perpendicular to the wire axis and proportional to the membrane porosity. The dipolar interaction field opposes the self-demagnetization field of an isolated single wire which keeps the magnetization parallel to the wire axis. An increase in the porosity therefore induces a switching of the effective anisotropy easy axis from parallel to perpendicular to the win axis above a critical porosity of 35-38% independent of the wire diameter.
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Citations
Encinas-Oropesa, A., Demand, M., Piraux, L., Huynen, I., & Ebels, U. (2001). Dipolar interactions in arrays of nickel nanowires studied by ferromagnetic resonance. Physical Review. B, Condensed Matter, 6310(10). https://hdl.handle.net/2078.5/91658 (Original work published 2001)