Hysteretic magnetic pinning and reversible resistance switching in High-Tc superconductor/ferromagnet multilayers

Details Hysteretic magnetic pinning and reversible resistance switching in High-Tc superconductor/ferromagnet multilayers Hysteretic magnetic pinning and reversible resistance switching in High-Tc superconductor/ferromagnet multilayers

2011-07-06

arxiv.org/abs/1107.1122v1

Phys. Rev. B 84, 054539 (2011)

Physics

Condensed Matter

Superconductivity

to appear in Physical Review B

Scientific paper

10.1103/PhysRevB.84.054539

We study a high-TC superconducting (YBa2Cu3O7-d) / ferromagnetic (Co/Pt multilayer) hybrid which exhibits resistance switching driven by the magnetic history: depending on the direction of the external field, a pronounced decrease or increase of the mixed-state resistance is observed as magnetization reversal occurs within the Co/Pt multilayer. We demonstrate that stray magnetic fields cause these effects via i) creation of vortices/antivortices and ii) magnetostatic pinning of vortices that are induced by the external field.

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