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

被引：6

作者：

Singh, Amrita ^{[1
]}

Chowdhury, Debtosh ^{[1
]}

Ghosh, Arindam ^{[1
]}

机构：

[1] Indian Inst Sci, Dept Phys, Bangalore 560012, Karnataka, India

来源：

APPLIED PHYSICS LETTERS | 2009年 / 95卷 / 09期

关键词：

ELECTRICAL NOISE; DIFFUSION; FLUCTUATIONS; DYNAMICS; NI;

D O I：

10.1063/1.3212872

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

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. (C) 2009 American Institute of Physics. [DOI: 10.1063/1.3212872]

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页数：3

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