Joaquín De La Torre Medina et al 2008 J. Phys. D: Appl. Phys. 41 032008 doi:10.1088/0022-3727/41/3/032008
Joaquín De La Torre Medina1, Michaël Darques and Luc Piraux
Show affiliationsArrays of nickel nanowires embedded into polycarbonate membranes were studied by means of ferromagnetic resonance. Large magnetoelastic effects were evidenced in the entire temperature range 4.3–300 K, which were attributed to the thermal expansion coefficients mismatch between the Ni nanowires and the polycarbonate membrane. The resulting magnetoelastic energy was measured as a function of both membrane porosity and diameter of the nanowires. For low volume fractions of Ni in Ni/polycarbonate samples, the magnitude of the magnetoelastic anisotropy may be as high as the shape anisotropy. Conversely, no magnetoelastic effects were observed in permalloy nanowires embedded in the same membranes.
75.80.+q Magnetomechanical and magnetoelectric effects, magnetostriction
75.75.+a Magnetic properties of nanostructures
75.50.Tt Fine-particle systems; nanocrystalline materials
76.50.+g Ferromagnetic, antiferromagnetic, and ferrimagnetic resonances; spin-wave resonance
Condensed matter: electrical, magnetic and optical
Issue 3 (7 February 2008)
Received 12 October 2007, in final form 11 December 2007
Published 11 January 2008
Joaquín De La Torre Medina et al 2008 J. Phys. D: Appl. Phys. 41 032008
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