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arXiv · 1108.2125

Experimental observation of an enhanced anisotropic magnetoresistance in non-local configuration

Daniel Rüffer·Franz D. Czeschka·Rudolf Gross·Sebastian T. B. Goennenwein
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Abstract

We compare non-local magnetoresistance measurements in multi-terminal Ni nanostructures with corresponding local experiments. In both configurations, the measured voltages show the characteristic features of anisotropic magnetoresistance (AMR). However, the magnitude of the non-local AMR signal is up to one order of magnitude larger than its local counterpart. Moreover, the non-local AMR increases with increasing degree of non-locality, i.e., with the separation between the region of the main current flow and the voltage measurement region. All experimental observations can be consistently modeled in terms of current spreading in a non-isotropic conductor. Our results show that current spreading can significantly enhance the magnetoresistance signal in non-local experiments.

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Daniel Rüffer, Franz D. Czeschka, Rudolf Gross, Sebastian T. B. Goennenwein. 2011-08-10. Experimental observation of an enhanced anisotropic magnetoresistance in non-local configuration. https://doi.org/10.1063/1.3640487

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