2009/08/02 by Amrita Singh, Debtosh Chowdhury, Debtosh Chowdhary +1
Materials Science · Physics and Astronomy · #Diffusion #Domain wall (magnetism) #Electrical resistivity and conductivity #Kinetics #Magnetic and transport properties of perovskites and related materials #Magnetic domain #Magnetic properties of thin films #Multiferroics and related materials #Nanoporous #Nanowire #Noise (video) #cond-mat.mes-hall
paper · pdf · doi:10.1063/1.3212872
7 pages, 4 figures
arxiv created 2009/08/02 · openalex publication_date 2009/08/31 · arxiv updated 2015/05/13 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
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.