Chiral magnetoresistance in Pt/Co/Pt zigzag wires
- Chiral magnetoresistance in Pt/Co/Pt zigzag wires
- 한동수; Yuxiang Yin; June-Seo Kim; Reinoud Lavrijsen; Kyung-Jin Lee; Seo-Won Lee; Kyoung-Whan Kim; Hyun-Woo Lee; Henk JM Swagten; Bert Koopmans
- Issue Date
- Applied physics letters
- VOL 110, NO 12, 122401
- The Rashba effect leads to a chiral precession of the spins of moving electrons, while the Dzyaloshinskii-Moriya interaction (DMI) generates preference towards a chiral profile of local spins. We predict that the exchange interaction between these two spin systems results in a "chiral" magnetoresistance depending on the chirality of the local spin texture. We observe this magnetoresistance by measuring the domain wall (DW) resistance in a uniquely designed Pt/Co/Pt zigzag wire and by changing the chirality of the DW with applying an in-plane magnetic field. A chirality-dependent DW resistance is found, and a quantitative analysis shows a good agreement with a theory based on the Rashba model. Moreover, the DW resistance measurement allows us to independently determine the strength of the Rashba effect and the DMI simultaneously, and the result implies a possible correlation between the Rashba effect, the DMI, and the symmetric Heisenberg exchange.
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