Conductance Quantization and Magnetoresistance in Magnetic Point Contacts

Details Conductance Quantization and Magnetoresistance in Magnetic Point Contacts Conductance Quantization and Magnetoresistance in Magnetic Point Contacts

1999-06-28

arxiv.org/abs/cond-mat/9906406v2

Phys. Rev. Lett. 84, 1003 (2000)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 4 figures, revised version with new figures

Scientific paper

10.1103/PhysRevLett.84.1003

We theoretically study the electron transport through a magnetic point contact (PC) with special attention to the effect of an atomic scale domain wall (DW). The spin precession of a conduction electron is forbidden in such an atomic scale DW and the sequence of quantized conductances depends on the relative orientation of magnetizations between left and right electrodes. The magnetoresistance is strongly enhanced for the narrow PC and oscillates with the conductance.

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