Resistivity noise in crystalline magnetic nanowires and its implications to domain formation and kinetics

Singh, Amrita and Chowdhury, Debtosh and Ghosh, Arindam (2009) Resistivity noise in crystalline magnetic nanowires and its implications to domain formation and kinetics. In: Applied Physics Letters, 95 (9).

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Abstract

We have investigated the time-dependent fluctuations in electrical resistance, or noise, in high quality crystalline magnetic nanowires within nanoporous templates. The noise increases exponentially with increasing temperature and magnetic field, and has been analyzed in terms of domain wall depinning within the Neel-Brown framework. The frequency-dependence of noise also indicates a crossover from nondiffusive kinetics to long-range diffusion at higher temperatures, as well as a strong collective depinning, which need to be considered when implementing these nanowires in magnetoelectronic devices.

Item Type:	Journal Article
Publication:	Applied Physics Letters
Publisher:	American Institute of Physics
Additional Information:	Copyright of this article belongs to American Institute of Physics.
Keywords:	Electrical noise;wall motion; diffusion;fluctuations;films;dynamics;ni.
Department/Centre:	Division of Physical & Mathematical Sciences > Physics
Date Deposited:	16 Dec 2009 07:10
Last Modified:	19 Sep 2010 05:46
URI:	http://eprints.iisc.ac.in/id/eprint/23487

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