Asymmetric magnetoresistance of nanowires with perpendicular anisotropy seen as a contribution from the contacts

作者：Nguyen V D^*; Vila L; Marty A; Warin P; Vergnaud C; Jamet M; Notin L; Beigne C; Attane J P

来源：Journal of Applied Physics, 2013, 113(18): 183906.

DOI：10.1063/1.4804146

We report longitudinal magnetoresistance of 50 nm wide FePt and 2 mu m wide CoPt wires with perpendicular anisotropy. In addition to magnon and domain wall magnetoresistances, which are symmetric in field, there appears an asymmetrical voltage signal due to the extraordinary Hall effect, usually understood as the effect of circulating currents at the vicinity of a domain wall. We show that in nanowires it can alternatively be seen as a contribution of the electrical contacts. The symmetries and amplitudes of the observed effect are found to be in good agreement with a simple model.

• 出版日期2013-5-14
• 单位中国地震局