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arXiv 1402.3183cond-mat.mes-hall
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变程跳跃电导率区铁磁颗粒系综的巨磁电阻效应

Giant magnetoresistance for ensembles of ferromagnetic granules in variable range hopping conductivity regime

V. I. Kozub, A. V. Shumilin

摘要:

本文研究了中等磁场对隧道势垒分隔的铁磁颗粒阵列的可变射程跳跃电导率的影响。结果表明,在Fe-N-Fe-N体系中,所产生的磁电阻可以明显大于标准的“巨”磁电阻。多层膜该效果与中间颗粒内的虚拟过程中可用的状态密度的增益有关,这是由于磁场诱导的颗粒磁化的排列。

英文摘要:

We study an effect of moderate magnetic field on variable range hopping conductivity in arrays of ferromagnetic granules separated by tunnel barriers. It is shown that the resulting magnetoresistance can be significantly larger than the standard "giant" magnetoresistance in Fe-N-Fe-N... multilayers. The effect is related to a gain in densities of states available for the virtual processes within the intermediate granules due to magnetic-field induced alignment of the granule magnetizations.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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