Resistance fluctuations and 1/f noise in single crystalline Ni nanowires
نویسندگان
چکیده
We measured the low frequency (10mHz < f < 10Hz) resistance fluctuations (Noise) in single crystalline ferromagnetic Ni nanowires (diameter ∼ 35nm) in the temperature range 80K-300K. The noise spectral power shows 1/f dependence. The nanowires in an applied magnetic field show negative magetoresistance that saturates for H ≤ HC . The noise spectral power shows a reduction in low applied field and becomes field independent for H ≥ HC . This indicates that a part of the observed 1/f noise arises from magnetic origin. The magnetic part is associated with thermally activated domain wall fluctuations that couples to the resistance fluctuations. PACS numbers: 72.70.+m, 73.50.Td ∗ email: [email protected] † email: [email protected] ‡ email: [email protected]
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