Magnetism

A comparative analysis of the mechanisms of pinning of a domain wall in a nanowire

A. A. Ivanov^a, V. A. Orlov<sup>b

a</sup> Siberian Federal University, Krasnoyarsk
^b Krasnoyarsk State Pedagogical University named after V. P. Astaf'ev

Abstract: A comparative analysis of the influence of random fluctuations of the crystallographic anisotropy and surface roughnesses on the pinning of a domain wall in a nanowire has been performed in the framework of the model of a polycrystalline nanowire. The initial magnetization curve and the coercive force for these mechanisms of pinning have been calculated. A criterion has been formulated according to which surface inhomogeneities of the nanowire play the key role in the process of pinning of a domain wall. The analytical results obtained have been verified using computer simulation.

Received: 14.04.2011

 English version: Physics of the Solid State, 2011, 53:12, 2441–2449

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