Experimental observation of an enhanced anisotropic magnetoresistance in non-local configuration
| Autor: | Franz D. Czeschka, Sebastian T. B. Goennenwein, Rudolf Gross, Daniel Rüffer |
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| Rok vydání: | 2011 |
| Předmět: |
Physics
Physics and Astronomy (miscellaneous) Condensed matter physics Magnetoresistance Condensed Matter - Mesoscale and Nanoscale Physics Flow (psychology) Magnitude (mathematics) FOS: Physical sciences Signal Conductor Mesoscale and Nanoscale Physics (cond-mat.mes-hall) Current (fluid) Order of magnitude Voltage |
| DOI: | 10.48550/arxiv.1108.2125 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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