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Ferromagnetic resonance of NiFe/Cu multilayered nanowires

G. ABABEI1,* , A. POPA2, N. LUPU1, L. M. GIURGIU2, H. CHIRIAC1

Affiliation

  1. National Institute of Research and Development for Technical Physics, 700050 Iasi, Romania
  2. National Institute for Research and Development of Isotopic and Molecular Technologies, 400293 Cluj-Napoca, Romania

Abstract

Ferromagnetic resonance (FMR) response of Ni80Fe20 single layered and [Ni80Fe20(50nm)/Cu(10nm)]xn multilayered nanowires was investigated. FMR studies indicated that the easy axis of magnetization of nanowires is preponderant parallel to the nanowires axis. The magnetocrystalline anisotropy is smaller than other factors such as shape anisotropy and dipolar interactions due to the high aspect ratio of nanowires. The effective anisotropy field (Heff), the giromagnetic ratio, γ, and Landé factor, g, were evaluated to be γ = 2.88 MHz/Oe, Heff = 2.76 kOe and g=2.08 for [NiFe/Cu]xn multilayered nanowires, and γ = 2.94 MHz/Oe, Heff = 3.36 kOe and g=2.1 for NiFe single layered nanowires..

Keywords

Ferromagnetic resonance, Microstripline, Nanowires.

Submitted at: Nov. 15, 2010
Accepted at: April 11, 2011

Citation

G. ABABEI, A. POPA, N. LUPU, L. M. GIURGIU, H. CHIRIAC, Ferromagnetic resonance of NiFe/Cu multilayered nanowires, Journal of Optoelectronics and Advanced Materials Vol. 13, Iss. 4, pp. 405-408 (2011)