Towards precise measurement of oscillatory domain wall by ferromagnetic Josephson junction

Details Towards precise measurement of oscillatory domain wall by ferromagnetic Josephson junction Towards precise measurement of oscillatory domain wall by ferromagnetic Josephson junction

2012-02-02

arxiv.org/abs/1202.0382v2

Appl. Phys. Lett. 100, 152402 (2012)

Physics

Condensed Matter

Superconductivity

3 pages, 2 figures

Scientific paper

10.1063/1.3701782

We theoretically propose a principle for precise measurement of oscillatory domain wall (DW) by a ferromagnetic Josephson junction, which is composed of a ferromagnetic wire with DW and two superconducting electrodes. The current-voltage curve exhibits stepwise structures, only when DW oscillates in the ferromagnetic wire. The voltage step appears at V = n(\hbar/2e)\omega_DW with the fundamental constant \hbar/e, integer number n, and the DW frequency \omega_DW. Since V can be determined in the order of 10^9 accuracy, the oscillatory DW will be measured more precisely than present status by conventional method.

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